SuperV, Zscreen has the added feature of auto-uploading to an FTP site. The whole thing is done is one click. I use it all the time.
The old Print Screen way:
-Press Print Screen
-Paste into MS Paint because copied image is not supported by other editors
-Copy from Paint to other editor
-Save to web format
-Open FTP folder or program
-Upload File
Zscreen way:
-Press a key combination
-Go grab yourself a sammich