If you like playing Panini's new trading card basketball game, Adrenalyn, then you'll want to be sure to check out Twitter to get some free codes to build up your stack.
Follow on Twitter:
The Panini Adrenalyn game is all about building up your cards online. Just by signing up they'll give you some free online cards. Then you can go take your stack of cards and challenge other collectors online to a dual. Cards from your deck against their deck. The person with the most points at the end wins, and if you were playing for stakes, cards will be transferred to the winning team!
UPDATE: Check the homepage for 6 free Panini Basketball Codes from April 29 - May 4!
2009/10 Panini Adrenalyn XL NBA Basketball Checklist