If you have an account at MLB.com (or sign up for one) you can download 2 A's games for free. There is a story on the A's home page called Clinch Time. It will take you to the video download page. You can get the game when they clinched the AL West or Game 3 when they swept the Twins.
Warning: The downloads are big (mine says it is going to take 2 hours plus and I have DSL).