Make your voice heard to our product team -- leave a comment on this post with your feature requests.
[Don't know what our platform is today...? Check out the Windows XP Media Center Edition Software Development Kit (SDK) for more information.]
P.S. Make sure you read the question carefully, noticing the use of the word 'platform.' I am more than happy to pass along consumer oriented feature requests, but my biggest influence is in the development of third party applications which extend Media Center.
P.S.S. Another way to ask the question: If you were to sit down and write an application for use with remote control and viewed on your TV, what developer features would you want or need?
This is a personal weblog. The opinions expressed here represent my own and not those of my employer.