I was talking with Cthulhu (DACers may know him, he's Brazilian too) on MSN, when he suggested that we try to play Arcanum multiplayer on Hamachi. It's worked! Well... I just did this thread to tell you guys about that (if you dind't knew before).
Hey! That's a good idea! I use that to play Little Fighter 2 with some friends of mine. I should tell my buddy with Arcanum to reinstall and get Hamachi it so we can try it out!