For the record, feel free to check, but I was in the crowd saying Hussey should be dropped in '09, possibly before the Oval Test. That said, what became apparent fairly quickly was that there was noone to replace him because there was no-one putting serious pressure on his spot. The young blokes in line for his spot didn't look like Test players and the guys who were scoring in Shield cricket were 30+, hardly the foundations of a youthful rebuild of the team. Hussey dropping back to 6 meant he could at least play a role no-one else was up to and that he did. It's not his fault that 3 years on there are still blokes who don't look up to it and, even with the dearth of decent bats in the country, there should be some sense that a bloke has earnt his spot in the Test side.
You can't just pick young blokes under the pretense of 'investing' in them unless they have performances behind them or obviously have the game to survive playing Tests. Tests are a harsh place to develop your game.