Nintendo Promises 3rd Party Support
Eurogamer reports on claims by George Harrison (NoA's Senior VP for Marketing) that the Revolution will feature extensive third-party support in the coming years. From the article: "'One of the lessons we tried to learn from GameCube was that we kept things too close. And so as we got ready to launch, we had some of our own great games but third parties were kind of behind the eight ball in terms of being able to have games ready,' Harrison stated. In terms of early support for the Revolution, which launches this year alongside Sony's PS3, third party software ought to be available in abundance, Harrison confirming 'We've got more than 1,000 developer kits including the controller kits, out, so there should be plenty there.'"
You might want to head over to http://www.warioworld.com/ to get an idea for the process you have to go through in order to get your hands on previous dev kits. I believe metrowerks makes tools for game dev http://www.metrowerks.com/.
Now, things may be different for the rev since it looks like they might let indy devs get their hands on these relatively easily, but in the past I think you needed a dev license just to obtain the kits.
I'm in the same boat as you, I'd really like to work on this system as well.