If you have an account with Betfair you can watch some live football on your PC.
Right now Sweden v Brazil is on as well as Austria v Holland and Switzerland v Germany.
You could open an account if you just wanted to watch the games.
A normal weekend has some Portugese/Italian/South American games.
Alright not UK teams but can't grumble for nowt.
Other Sports too:
Live horseracing, football, tennis and more streamed to your desktop.
Horseracing Events: All Racing UK races, including Cheltenham 2008.
Soccer Events: Italian Serie A, Portuguese Superliga, UEFA Cup, International Friendlies and more.
Tennis Events: ATP and WTA tournaments all streamed live on your PC.