Freelancer is a very non-demanding game when it comes to online connections. I usually have internet radio on, skype, msn and sometimes a download going on and it STILL works perfectly, with some rare Yellow lag.
I use a simple 1mb connection for all of this, with the download chugging away at around 120 - 150 kb/s and 128kb music quality for the radio.
Basically, Freelancer takes up less bandwidth than looking up these forums might sometimes.
