Add the Platinum and HG/SS sets
As far as I can see in the card database, all of the sets in this time frame are not available. I hope you add them in soon, most of the cards I own are from those sets, and sets like Stormfront and Triumphant have really good cards.
From FireRed LeafGreen up to Call of Legends, more exactly. Some improvement on that? (Please take all the time you need, we can't complain!)