My 2 cents

I've been dinking around with the alpha.deckbox site and I'm very impressed with it.

It's probably to late for this next release but i feel like being able to differentiate promo cards would be a good thing.  Wizards prints different promos with very different values than the original printing.  The obvious example being the judge promos.

Also I don't think the commander's arsenal has been added to the database yet