I agree, the recent good results for Sri Lanka's batsman have come mainly in the Windies and the subcontinent and they are very different places to bat to Australia. Sangakarra, Jayawardene and Jayasuria have seen enough to know how to handle things, but I have serious doubts about the others and whether they will adjust quick enough because you can bet Clark will be right on the money and any trepidation or technical ifi-ness will be exposed.Clark gets bounce off a length. On Australian wickets, I really think some of the Sri Lankan batsmen will struggle with that. Sangakkara should be okay, as should Jayawardene and to a lesser extent Dilshan who is a good cutter of the ball. But Tharanga will just get owned, straight up, IMO, and Silva will struggle as well. Just too many holes.
Australia's attack certainly wont be as formidable as it has been for over a decade now, and if one or two of the middle order have big series they could really push Australia close (which I hope they do...because then it will be one hell of a series), but my gut tells me somethings likely to go wrong, remember australia havent lost a home series in 15 summers, it will take something very special not to make it 16.
As for them beating England, you certainly wouldnt bet against it, depends largely on the makeup of the England attack, how Monty and Flintoff go will be the real clincher I think, and whether England continue to handle Murali like a bunch of muppets.