iStopMotion 1.10.1 from Boinx software is out, and it has a cool new feature for Apple Remote enabled Macs. That's right, you can use the remote to interact with the program. The menu button takes a picture (this is a stop motion program, in case you didn't know) and the play button plays the movie you are working on. That's pretty nifty.
If you are interested in stop motion photography then iStopMotion is the way to go. There is a free demo and the full version costs $40.