There are a few options.
1. Sky Sports. They usually broadcast one of the morning games, one of the afternoon games, the Sunday night and Monday night games, and Thursday and Saturday games later in the season. They also broadcast all the playoff games and the Super Bowl. Channel Five also broadcasts some games, but way fewer than Sky does.
2. NFL.com. Any game that Sky is not broadcasting can be watched online. You can buy a subscription for various lengths of time (one weekend, a month, the whole season).
3. Slingbox. I haven't tried this yet, but this might be the year. You set up a Slingbox somewhere in the US, and then that TV can broadcast its signal over the internet to any computer. Obviously you'd need to have somewhere in America to do this (parents' house, siblings' house, etc).
4. This one isn't a way to watch games, I just wanted to say the 49ers suck, and GO COWBOYS!!!
