[raidan]

I recently purchased Dropshare[0] when it was on 'special' for $0.99 on the App store. This is more targeted at being able to send the screenshots to your own server (via scp) but has screenshot and video recording support.

Though, I imagine you could easily achieve the basic functionality by writing a quick script to run the cmd line 'screencapture' and tying it to a hot key combo.