About the last 7 months I have been participating in the Mount&Blade Warband beta testing! Before that it was playing Mount&Blade itself.
If you like the medieval joust, you should try this game. It is medieval combat simulation at it's best, on horseback or as a foot soldier.

Mount&Blade has been out a couple years but Warband is not to be released until about the end of March 2010. Mount&Blade is single player and Warband is going to be multiplayer capable with as many as 64 players on some maps. The beta test has been a lot of fun and I will sure miss some of the players I have had the pleasure of testing with.