I had been looking for a solution to get my fix of American mostly-hand-but-sometimes-football. I'm about to download TVU, TVants, and Sopcast onto my Mac's bootcamped Windows and see which works best, and I found some torrent sites that have games soon after they're played.
Torrents are how I've been doing TV for a while. You don't get the episodes as soon as they come out, but I like it that way. I'll download 2-3 at a time and then watch them at once. It's just as dangerous as DVDs with whole seasons, though; evenings tend to disappear.
http://streamednfl.blogspot.com/There's a link with football casts. Since it's on blogspot you'll need an anonymizer to get around the firewall. I recommend Tor.
I get most of my TV torrents from thepiratebay.org and isohunt.com