So, last time I was in Walmart on Grandview (eew, I know) they had a Sony 1080P camcorder on sale for $100. Looks like it took SD cards, so you could expand it, and it had a flip-out screen. Same price as the on-sale Vado HD, and it does 1080!
I'm not sure of the exact model (walmart doesn't have it on their site), but it looked a lot like this:
Might be a little more aerodynamic for mounting on a Gecko or a RAM mount, too!