I picked up Borderlands last night at midnight and I played it till about 1:30 before going to bed. Within that first hour and a half or so, I must admit that I was impressed with the game.
I plan on playing some more today and I will add to this thread with my impressions of the game. I wanted to post an opening statement of some sort, but I don't feel like I was in the right mind last night to really remember or appreciate anything that I experienced from a technical perspective. What I will say, though, is that the game was fun enough to make me want to play it from the moment that I woke up this morning, so that has to count for something.