Gave my Canon G9 a test run today... impressive for a point and shoot! Noise IS an issue, but this isn't the camera I'll be using for stock, so it won't be a problem. And it looks like even if I do want to use shots as stock, downsizing a bit tightens everything up and I think the results would be acceptable.
All in all, I'm glad to have it - much more convenient than carrying the 5D everywhere!
Next up, waterproof housing....