Yeah, I found Snapz Pro on Google the other night, but I really don't need the extra features like being able to record narration... I mean, I can do that with iMovie, but if if this is what it takes, then, thanks!
It puts a watermark in the middle of the screen, when you register it goes away. I've used it for a few screencasts for my applications. It works well. Especially on the Mac Pro.