Wow that is one nice setup there Dave!  I talked to Scott (ADK) about a three monitor setup with a Dell 30" in the middle (2560x1600 resolution) then I could take my two existing 21.3" SyncMasters and turn them portrait to add 1200x1600 res. wings on each side (haven't done it yet).  I thought that would be about as good as it gets, but you've already gone beyond that!
 
Great job!