Snagit's a Slick Screen Grabber
For many Mac users, screen grabbing tools provided by OS X are adequate for their needs.
If you need to snatch a full screen, shift + command + 3 will suffice. If you want to carve out a section of your display, there's shift + command + 4. However, some Mac jockeys need to go beyond those simple grabbing techniques. For those users, there's Snagit 2.
http://www.macnewsworld.com/rsstory/77675.html