Browser based market and collection management
-would be great for us working stiffs who can't run the client or the flash from work. Even simply having access to a card database (like TFWInfo's data) would be nice, but I'd really love to scrabble a deck together over lunch so I could test it at home. Better yet would be the ability to log in and buy the cards I need off the market so I'd have them available when I got home.


AI improvements
We are all aware of some of the AI's deficiencies, so I won't go down that path, rather I'd like to suggest another tier of the AI...one akin to running a plague rat or fireball test (for you old-school MTG'ers out there). This tier of AI would basically have an 'impossible' deck from a couple of different themes so you could see how you fair against an opponent dropping down serious buildings, or a continuous spawn of critters, etc. The AI's build would not have to follow the rules...it could bust the 3x card rule to really test you on its particular theme.