I'm having the same issues as well. Get all my info and that pain in the butt Cd key in , hit enter and it comes up with a network error everytime. I've got myself v1.05 and i've checked impulse for v1.1 which as far as i can tell is yet to be released... so i'm kinda standing here going wtf .
I've turned my firewall off (mercy plea don't hack me =D) and nothing has changed... so i think it might just be my uni's firewall but they made recent changes to it which i would think wouldn't be a problem. I'll try it from a different location this weekend, but in the meantime anyone got any other ideas about what might be the problem?
Also anyone able to tell me what the game is like in MP. Dying to try it online!