digicams

I have a gift certificate to overstock.com and I’d like to spend it on a digicam, the better to endlessly document my life on the internets. as always, I’m THRIFTY and don’t want to spend too much cash. Here’s my criteria, in vague order of importance:

1. response time. I take a lot of snapshots and digicams have always REALLY frustrated me in the past with their very slow response time.
2. camera size — small is better!
3. picture quality

Can anyone offer any suggestions?