Update....
Derbyshire
Overseas player: Chris Rogers (Australia)
Ins: Robin Peterson (South Africa, KPK), Steffan Jones (Somerset), Lee Goddard (Durham), Mark Footitt (Nottinghamshire)
Outs: Stephen Stubbings (REL), Dan Birch (REL), Dom Telo (REL), James Pipe (RET), Wavell Hinds (REL), Mark Lawson (REL), Charl Langeveldt (REL), Stuart Law (REL)
Durham
Overseas player: TBA
Ins: Michael Richardson (MCC Young Cricketers), Ben Stokes (YTH)
Outs: Lee Goddard (Derbyshire), Paul Wiseman (RET)
Other news: Durham are still looking for an overseas player; captain Will Smith has said last season's overseas star Shivnarine Chanderpaul (West Indies) has "probably" played his last game for the county.
Essex
Overseas player: Danish Kaneria (Pakistan) hopes to return, but says "it is up to the Pakistan Cricket Board"; Essex may need cover if Kaneria tours England with Pakistan
Ins: Billy Godleman (Middlesex), Max Osborne (YTH), Michael Comber (YTH)
Outs: Varun Chopra (Warwickshire), Jason Gallian (RET), Jahid Ahmed (REL), James Middlebrook (Northants)
Possible signings: Coach Paul Grayson wants to sign "a strike bowler" after missing out on Matthew Hoggard.
Glamorgan
Overseas player: Mark Cosgrove (Australia); Shaun Tait (Australia, for Twenty20 Cup)
Ins: David Brown (Gloucestershire), James Allenby (Leicestershire), Nick James (ex-Warwickshire, has signed a contract after successful trial spell)
Outs: Alex Wharf (RET), Ryan Watkins (REL), Mike O'Shea (REL)
Gloucestershire
Overseas player: James Franklin (New Zealand)
Ins: Jon Batty (Surrey), David Payne (YTH), Chris Dent (YTH)
Outs: Stephen Adshead (REL), Grant Hodnett (REL), Matthew Gitsham (REL), David Brown (Glamorgan), Craig Spearman (REL), Tom Stayt (REL)
Possible signings: New Zealand bowler Kyle Mills has stated an interest in playing for Gloucestershire in the 2010 season.
Hampshire
Overseas player: Ajantha Mendis (Sri Lanka), Shahid Afridi (Pakistan, for Twenty20 Cup)
Ins: Simon Jones (Worcestershire), Michael Bates (YTH), Kabir Ali (Worcestershire)
Outs: Imran Tahir (Warwickshire), John Crawley (RET), Billy Taylor (REL), Tom Burrows (REL), Tom Parsons (REL), Chris Morgan (REL), Chris Tremlett (Surrey)
Kent
Overseas player: Stuart Clark (Australia, first half of season)
Ins: None
Outs: Martin Saggers (RET), Ryan McLaren (REL)
Possible signings: McLaren, who has relinquished his Kolpak status by returning to the Eagles in South Africa, could yet find himself back at Canterbury next summer as an overseas player. Coach Paul Farbrace wants a spinner for the second half of the season.
Lancashire
Overseas player: Ashwell Prince (South Africa, first part of season), Kumar Sangakkara (Sri Lanka, after Prince departs)
Ins: Stephen Moore (Worcestershire), Luke Procter (YTH), Gary Montgomery, Daren Powell (KPK, subject to visa and registration)
Outs: Mal Loye (Northants), Steven Mullaney (Nottinghamshire)
Other news: Francois du Plessis's future is in doubt because of the new crackdown on Kolpak players, but the county hope to keep him - one option would be to register him as an overseas player.
Leicestershire
Overseas player: Andrew McDonald (Australia), Brad Hodge (Australia, for Twenty20 Cup)
Ins: Matthew Hoggard (Yorkshire), Will Jefferson (Nottinghamshire), James Benning (Surrey)
Outs: Iain O'Brien (Middlesex), James Allenby (Glamorgan), HD Ackerman (REL), Boeta Dippenaar (REL)
News: Claude Henderson - the first Kolpak signing in county cricket - has been granted British citizenship.
Middlesex
Overseas player: Iain O'Brien (New Zealand); Adam Gilchrist (Australia, for group stages of Twenty20 Cup)
Ins: Iain O'Brien (Leicestershire), Paul Stirling (Ireland), Scott Newman (Surrey), Tom Smith (Sussex), Josh Davey (YTH), Toby Roland-Jones
Outs: Nick Compton (Somerset), Billy Godleman (Essex), David Nash (RET), Alan Richardson (Worcestershire), Chris Silverwood (REL), Murali Kartik (Somerset), Ben Scott (Worcestershire, loan starting on 3 April for minimum of four weeks)
Other news: India legend Sachin Tendulkar has turned down the chance to join for the Twenty20 Cup, but Middlesex are hopeful of signing South Africa pace bowler Makhaya Ntini as a Kolpak player. Meanwhile, they have the option to recall Scott from his loan spell if first-choice wicketkeeper John Simpson is injured or loses form.
Northants
Overseas player: TBA
Ins: Mal Loye (Lancashire), James Middlebrook (Essex)
Outs: Mark Nelson (REL), Shaun (aka "Bud") Bailey (REL), Steven Crook (REL), Ryan Cummins (REL), Graeme White (Nottinghamshire), Monty Panesar (Sussex)
Possible departures: South African pair Johan van der Wath and Riki Wessels may not be able to return in 2010 because of problems with their working visas.
Nottinghamshire
Overseas player: David Hussey (Australia) - though Notts are looking for cover in the early part of the season (while Hussey is at the IPL); Dirk Nannes (Australia, for Twenty20 Cup)
Ins: Neil Edwards (Somerset), Graeme White (Northants), Steven Mullaney (Lancashire), Scott Elstone (YTH)
Outs: Mark Ealham (RET), Will Jefferson (Leicestershire), Mark Footitt (Derbyshire), Jason Brown (REL)
Somerset
Overseas player: Murali Kartik (India); Cameron White (Australia, for Twenty20 Cup); Kieron Pollard (West Indies, for Twenty20 Cup)
Ins: Murali Kartik (Middlesex), Nick Compton (Middlesex), James Hayman (YTH)
Outs: Neil Edwards (Nottinghamshire), Andy Caddick (RET), Carl Gazzard (RET), Justin Langer (RET), Omari Banks (REL), Steffan Jones (Derbyshire), Wes Durston (REL)
Surrey
Overseas player: Piyush Chawla (India)
Ins: Steven Davies (Worcestershire), Gareth Batty (Worcestershire), Piyush Chawla (Sussex), Rory Hamilton-Brown (Sussex), Chris Tremlett (Hampshire)
Outs: Alex Tudor (REL), Pedro Collins (REL), Jon Batty (Gloucestershire), Scott Newman (Middlesex), Mark Butcher (RET), Jimmy Ormond (REL), Chris Murtagh (REL), Murtaza Hussain (REL), James Benning (Leicestershire)
Sussex
Overseas player: Yasir Arafat (Pakistan); Dwayne Smith (West Indies, for Twenty20 Cup)
Ins: Monty Panesar (Northants), James Anyon (Warwickshire), Luke Wells (YTH), Matt Machan (YTH)
Outs: Carl Hopkinson (joined coaching staff), Jason Lewry (RET), Tom Smith (Middlesex), Piyush Chawla (Surrey), Rory Hamilton-Brown (Surrey), Pepler Sandri (REL)
Other news: Although Dwayne Smith was unable to stay on as a Kolpak player, he will return for 2010's Twenty20 action.
Warwickshire
Overseas player: Imran Tahir (Pakistan) - subject to fitness tests and work permit
Ins: Varun Chopra (Essex), Imran Tahir (Hampshire)
Outs: Tony Frost (RET), James Anyon (Sussex)
Worcestershire
Overseas player: Phil Jaques (Australia, first half of season), Shakib Al Hasan (Bangladesh, from July onwards, subject to completion of visa arrangements)
Ins: Ben Cox (YTH), Jack Shantry (YTH), Alan Richardson (Middlesex), Ben Scott (Middlesex, loan starting on 3 April for minimum of four weeks), James Cameron (UKP)
Out: Steven Davies (Surrey), Gareth Batty (Surrey), Simon Jones (Hampshire), Stephen Moore (Lancashire), Ian Fisher (REL), Mehraj Ahmed (REL), Josh Knappett (REL), Kabir Ali (Hampshire)
Possible signings: Director of cricket Steve Rhodes is concerned about their lack of spin options until Shakib arrives in mid-season, and may look for an additional spinner.
Other news: Scott's loan deal may run until July when teenage wicketkeeper Ben Cox is free of school commitments, but Middlesex have the option to recall him if number one keeper John Simpson is injured or loses form.
Yorkshire
Overseas player: Ryan Harris (Australia)
Ins: None
Outs: Michael Vaughan (RET), Simon Guy (REL), Deon Kruis (RET), Matthew Hoggard (Leicestershire), Chris Taylor (RET)