What phone do u have? Droidx works with an app called real hdmi which let's u put anything on the phone on the tv. Blockbuster might prevent it with their update.
Sprint evo can't do it as far as I know.
Atrix and bionic are new so they might be modded to allow it. Im hoping bionic is. Webtop on the atrix(att) does a good job but u need the laptop for it.
Just so u know the dx works with my tv but the resolutions is hard to view and u can't change it like a pc. So it may not be all you think it will for webpage.
Now people need to make an android browser that links to a pc. The phone downloads the page data and let's the pc render the webpage that way we can tether with no fear of extra data charges to our unlimited phone data.