Re: What are you playing right now?
Ah, I forgot about split screen! Apparently both Borderlands games are split screen, though you may want to verify that independently. The co-op site Co-Optimus.com should sort you out as to playable games, though I find they love co op so much they tend to overrate the experience - each game has a single player and a co-op review.
Playing as the Tank in B1 is a howl in co-op.
Desperate times indeed! I've often found myself considering K&L as well! Bad...