Will need to discuss this with Dai-kun on how the server will load etc... or have the old 'show more' link under the cards. It used to be 5 cards with "More" link at the 6th card space. Not sure that can be done anymore after so many upgrades.
I personally think 9 cards in 3x3 may seem like a good idea (thought of it before myself too), but when I really went in to imagine it... I think it will be too much, and the cards may drown each other if it's been clustered like that.
Anyway, I will ask Dai-kun's opinion first because mainly I am also concern about the loading, spacing and how it will affect things.