Flash Remote

Remote Control your Mac and Windows Media Center via WIFI:

Flash Remote transforms your Android (2.2) devices into an Apple remote control. The only thing you have to do is, activate the screen sharing and allow VNC-user to access the system with a password.

The new Version now supports also Windows and the Windows Media Center.
For Windows you have to install a VNC Server first. Otherwise Flash remote can not access to your Windows System. Weve good experience with tightvnc.com.