Here’s the answer you’re looking for – PC2TV. This technology allows you to wirelessly stream any PC content – not just internet-based media – to your TV screen, over 802.11. The biggest draw is that you never have to worry about codec or file format compatibility. Anything playing on your PC will be reproduced on your TV. I even use it to look over my PowerPoint presentations for work, without having to sit in an office chair and stare at my laptop.
Quartics-developed PC2TV technology and it is available from a number of vendors, like AddLogix (http://www.internetvue.com/iv2020.htm)
or D-Link (http://www.dlink.com/products/?pid=655&sec=1).