SPGrab is very similar to the Gyazo screenshot app that DaveP mentioned in another thread, but this program has some additional options such as user-configurable hotkeys, the ability to choose what you want captured and allows you to specifiy your own FTP server if you don't want to use theirs.

SPGrab is a small windows application that runs in the background allowing you to quickly create screenshots and share them with anyone online via a tinyurl that is automatically copied right to your clipboard.

SPGrab allows you to take screenshots of your entire screen, active window, or of a selected area. Once the image is grabbed you can:

» Save to your computer
» Copy to your clipboard
» Upload to our server
» Upload to your own FTP

Website: www.spgrab.com
Download: http://cdn.spgrab.com/SPGrab.1.1.zip