My two cents is to spend more than $100 on your lipstick cams. Yeah, you can find them cheap, but the quality of those cheap ones is pretty dismal. On the other hand, to get quality, you've got to spend about $500! Here's one from B&H.

Of course, I'm mostly talking out of my *** right now. If that's a reasonable price for you, then... well... I wish I had your disposable income. I'm just recommending you stay away from those cheap X10-style cameras. They're 'color', but only if you REALLY stretch the definition of 'color'...

This is oh-my-god-cool: The Elmo SUV-Cam! (No relation to the red fuzzy monster.)