Taking a step back and thinking about this, there are a couple of issues in play..
1, The electorates of the three rural independents are pretty conservative, with a -8.7% swing against Labor in Katter's seat, -2.8% in Windsor's and -18.5% in Oakeshott's. That is pretty damning by itself. This is the same situation we had over here in the west in our last election with a significant swing against Labor, but not quite enough for the Lib's to win government. The NP leader briefly flirted with the ALP before eventually siding with their traditional conservative allies (but not before winning some pork for the bush). If the independents were to go with the ALP, I would expect a serious backlash against them in their electorates, just like would have happened against the Nationals here. Tony Crook (who defeated Wilson Tuckey) ought to remember that too.
2, At least a couple of the independents are against the mining tax, but are considering the very party who introduced it. That doesn't quite compute with me. You either want it or you don't!
3, Gillard, quite understandably is doing everything humanly possible to cling to power. The problem is, people who are desperate tend to make deals that they later regret. I think she will rue the day she got into bed with the Greens. A green controlled Senate and a conservative controlled house wouldn't actually be too bad, as it would be a check on Abbot's powers and prevent a return to things like work choices or any wacky socially conservative legislation. And because the Greens can't introduce legislation from the upper house, it puts a brake on anything crazy they might cook up too.
I would be amazed if the current parliament were to last the full term. All it would take would be one false move from the government (whoever they are) and we end up with a double dissolution.
Right now I think Abbot is in the box seat, whether he wins or not. If he wins government, their legislative program would be pretty modest and there wouldn't be anything contentious (he wouldn't dare in the first term). If Gillard wins, he gets to sit on the side line and watch the whole catastrophe unfold if the ALP make even one false move.