I just had to let you know about a app I tested few days back, it is not new but new to me
I have owned a Media Center for 4-5 years and ussually I have used Micro$oft Media Center. I finally tryed XBMC on the PC and that is one of the coolest app I have ever tryed on a PC...
After playing around for a bit I also found XBMC for Android in Market and that app is amazing as aftur setting it up I can browse my 7Tb collection on my Desire and Folio and then played every thing on the Media Center by selecting it on my Android device... prrr so cool and works really well with no delays.
Here is XBMC official on Market... market.android.com/details?id=org.xbmc.android.remote
Here is a review and configuration.... androinica.com/2010/07/how-to-set-up-xbmc-android-remote