Does anyone know how to produce a time lapse?

[Daniel Browning]

I love timelapse, it's my favorite thing to shoot.

what do I do with the pictures once they are on my computer?

There are a million different possible software workflows. One free solution is VirtualDub. Search google for "virtualdub timelapse" and you should get plenty of information on it.

[Jon Ruyle]

I'm shooting a timelapse if a 1000 piece puzzle being solved. (Each 2 or 3 pieces I shoot a frame). I was planning to use mencoder to make it into a movie... haven't tried it yet, though.