I had an idea a while ago, and linking it to the idea of the AmiZilla bounty makes it quite interesting. Basically, there would be a website where people would vote on what software they wanted made/ported. The top few would then be listed, and people could donate money to the project of their choice.
Drastic maybe, but perhaps this kind of thing is what's needed to spark Amiga software development?
As for me, I'd personally like any M$ compatible office suite.