Remote Potato HD for the iPad looks like the bridge between the iPad and the Windows Media Center world I have been waiting for. With the app you can browse and stream music, video and pictures from your Media Center PC directly to your iPad. It works over the local network or over the internet and looks very impressive, you can get full instant access to all your content without having to sync to the PC.
You can also browse the Media Center EPG, schedule recordings and with an Apple TV you can use Remote Potato HD for the iPad to send recorded TV directly to an Apple TV so effectively you can turn an Apple TV into a Windows Media Center Extender. You can read more and download the other version from remotepotato.com
The app is due very soon and you can see a great video demo showing off its features: