Mayhem, GREAT mod, it really suited me when I looked for a new change in my bigboard
The suggestions made before were great... buying additional usergroups it's EXTREMELY potential, meaning some users will see X forum, have Y pm's quota, have more or less restrictions, and so on.
Other NICE suggestion was the "expiration date" for the gifts. That would make users work harder so they can earn more points to spend.
Other ideas in my head, more sadistic

, involve buying attacks to users, like Banning for X days; dismember a user from a usergroup; changing the username, etc
This changes would make the forum experience more "gamer", like an RPG game, buying guns, shields, and potions and stuff :P. I'd LOVE to see a forum so interactive like the one in my head right now
SO, Mayhem, I'm sure you're working on 1.1, and I hope that you continue with this GREAT work you're doin'.
Best regards
Laucha