I have also written a grid for an Eyefinity set up. This one has bezel compensation built in and very easy instructions for changing the values to match your specific bezel compensation needs (couldn't find a way to add variables). Additionally, its easy to change the trigger area size for both the top trigger area and the sides.

The basic layout is that of default Windows 7, with snapping to the full width and height of a monitor, or half of either side.

EDIT: Upgraded grid to deal with different bezel compensation amounts for the left and right bezels.
Plan on adding vertical snapping for top and bottom halfs of the screen as well as moving full screen to center.