There are a series of recently released reports on invention available here: http://web.mit.edu/invent/report.html
Invention (coming up with new ideas) is the precursor to innovation (the process of commercialising new ideas). Sometimes the two get lumped together in thinking terms and I think it would be useful to consider issues involved with them separatly, especially for the emerging indy scene in australia.
The innovation side of finding the commercial or non-commercial business model(s) to get the product out there is a different ball game altogther.
Putting the two together in a viable business model is also a challenge.
Anyways, I think the reports are well worth reading if you want some general insight and focused anlaysis on this important area.
After all, all games start with an itch scratching the back of somebody's mind.