Hi Dan,
Is there a way to get the cell background colors that were selected in the move/resize? We're trying to verify whether the date is non-business based on the cell colors. This way, we don't have to make an additional trip to the db (the algorithm for calculating nonbusiness dates is pretty large, and can cause significant burden on the server).
If there is no way to get the cell colors, we will have to implement it in the way you mentioned, although that would be less desirable.