If you're the type who loves to labour over the allocation of skill points, you can plan your Borderlands 2 character while you wait for the game's official release.
2k have made live a skill tree calculator, which allows players to see each skill available to four playable characters including Axton, Salvador, Maya and Handsome Jack.
The calculator offers a total of 46 skill points to allot to 33 abilities, which are tiered according to how many points are required to unlock them.
Borderlands 2 releases on September 18. Early reviews suggest it'll be worth the wait.