I live in Canada, and have recieved 4 letters from the MPAA. I dont really download music, but rather old TV shows and movies. The ones that got me the notice were newer movies and a copy of a recent UFC event.
The government here is looking to set resonable fines of 500$ and hit as many people as they can. They have figured that a half million is a bit much :-?
It would seem that there may be an intersting issue with the way they are collecting IP's though.
The complaining party that notified my ISP (Rogers Cable) was ZUFFA which has the event rights for UFC. The strange part was that the offending download was put there by ZUFFA??? All of the fights were there, but all of the ZUFFA tags including the intro and theme music were removed?? Im guessing that they were the ones that hosted the torrent, and smell entrapment on this. But again, being in Canada kinda helps, for those in the US id be a little more worried..
If you only recieved one email from your ISP on this, I wouldnt freak out. I would however install a wireless access point, and go with the 'open network' 'ive been hacked' excuse if needed. It does seem to help in the cases it has been used in.
Or get a laptop, and do your downloading on open networks. If you do this stuff from your house, you may get away with it a few times, but....knock, knock, knock... :-/