I bought and played the original Borderlands when it came out. It was an excellent game to play with a friend. Forget all this move to online multiplayer, there ain't nothing like sitting down with a good friend and starting up a game that can turn the day into a gaming marathon. Thing was though, the experience got stale after a while. It was because of the in game environment, the lack of diversity. There is only so much of the same type desert landscapes I can take.
Thankfully, it looks like Borderlands 2 put in some different landscapes and it's expanded in more than just that area! Check out the Launch trailer for more.