Have you seen Hussey bowl? He's certainly a better spin bowler than Symonds and White AFAIC.
The thing is, though, his fans have nothing to whinge about, yet they try to do so, regularly. The most bemusing part of it is that they claim he's not even in contention for selection - how on earth do they know this? He could very well be in contention for selection and just miss out all the time for various reasons.
As far as first class cricket goes, he is dreadfully inconsistent and it wasn't that long ago he was dropped from the Victorian team. His scoring patten tends to resemble {124, 253*, 112, 4, 5, 1, 12, 0, 142} in first class cricket and it's not really what the Australian team are looking for. Not to mention the fact that middle order batting spots haven't been opening up like cans of soup in the test team.
His one day credentials are a bit different - he's a much more consistent batsman in that format and his claims are quite justified. I'm sure he's on the cusp of selection quite often, but others have been selected ahead of him for various reasons. Cameron White was in better form with the bat when selected, is more suited to #7 and was perceived as a bowling option. The criticism of the Voges selection does my head in - he's a few years younger than Hussey and has a much better record in one day cricket than Hussey. Hodge had experience at international level when picked and also has a better record in one day cricket than Hussey. Haddin has often been selected in squads as a wicket keeping option when touring and then played as a batsman anyway, but this is to groom him into international cricket and prepare for the retirement of Gilchrist.
Hussey may be good enough, he may not be. But to think he's been done some massive injustice by not being selected, or to assume he's not in contention at all, would be ridiculous.