Thomas Pleasance has released a beta of AirPlay for Windows Media Center, which does just what you think: it streams video and photos to a Windows Media Center PC via Apple's AirPlay.
To get started, install Apple's Bonjour for Windows and Pleasance's client on your Media Center PC. From there, fire up your iPhone or iPad and send over some photos or movies (note that music isn't supported yet).
The Digital Lifestyle has posted a hand