Windows 7 has the new Snap feature: the process of pushing a window against the side of the screen (or using a new hotkey) to snap it onto part of the screen space (this also allows for easy side-by-side comparison if snapping two windows: one to the left side of the screen and the other to the right).
Can this snap effect be done in Vista/XP with a modification of some kind?
For reference, a video of the Windows 7 snap effects are seen here: http://www.youtube.com/watch?v=MzQQcdw1qmY&