Say you take screenshots of your desktop or open applications now and then to show off via IM or Twitter. Sure, you know how to take that screenshot: Cmd-Shift-4 (for an area) or Cmd-Shift-3 (for the whole screen). But getting it out onto the web? What a hassle to fire up an FTP client or twitpic.com just to drop off one little picture!
Enter TinyGrab.