There a paid app call RealHDMI in the market that lets you display your phone's screen on your TV. From what I understand, there's no mirroring from your phone to the TV, so you'll have to blindly tap on the phone to control it. Youtube RealHDMI and see if it's something you want to buy.
Unfortunately the app goes in and out of the market throughout the weekend. I just snagged it this past weekend and have yet to try it out, but ever since 2.2 was released there have been a lot of crashes and required battery pulls after use. I believe the dev is working with an Linux dev to correct the issue. From what I understand he plans on releasing it briefly every OTHER weekend until the issue is completely fixed.
