Someone asked me recently about using a TV as a computer monitor.
We have been enjoying our gen-2 Apple TV (which streams from a number of Internet sources via Wi-Fi), but before that we connected our MacBook to the television. The aspect ratios of Macintosh and the TV were slightly different, but all-in-all it worked well enough.
Lifehacker article: Computer to TV.
Mark_
14:22 13 June 2011