It is an kickass game. We download a "PitFight" match type where you go in as level 10 characters and fight other players. (We set this up on the lan at work).
I made a level 10 Half Orc Fighter. He has 2 weapon fighting, improved power attack, improved knock down, weapon specialization longsword and shortsword, and some other cool stuff.
My strategy is simple: I start by activating my improved power attack (-10 to hit, +10 damage). Then I activate my knockdown. As soon as I spot the neemy, I charge them and bring'em down on the floor. Then the power attacks kick in automaticly (And I use a +3 longsword, a +1 shortsword). I know I get huge penalities with the stuff I use, but when they are on the ground you can't really miss to much and you do major damage in very little time. However, when the knockdown fails (rarely), then you have to run away and try again. Doesn't always turn out in your favour!