Yet another screen shot grabber: Shotty - Overview
Shotty allows you to temporarily host the screen shots under http://images.devs-on.net/en/Default.aspx and a few more providers.
PS. Not to be used if you want to store evidences after the software development project closure (development phase, testing phase) but good enough for some projects where you merely want to attach a screen shot to an issue and you don't have a file server with a network share available to do it.
