Hi tjdavids77 and welcome
the money wouldn't stop me from devloping a commercial title for WiiWare but time most probably would. With a full time job, coding is only ever going to be a hobby so it's really difficult to commit to a commercial project and the deadlines etc that brings.
Ideally I'd like WiiWare to be open to everyone like XNA is, then I could try and code something at my own pace at limited cost and probably release it as freeware if it's ever completed. Everything I hear so far though says Nintendo wont be allowing anything like that.....for obvious reasons.
Geometry Wars: Galaxies is already wip for Wii and DS.
There's room for more than one twinstick shooter and I'm sure there will be others. If you've played GW then you'll know it has a pretty different feel to it than Echoes and indeed many of the other similar games out there.
FWIW I can't play GW anymore. I now find it a bit limited and frustrating compared to the glorious