Funkyfactory have been in touch to let us know about their AerodromMCE plugin for Windows Media Center.
Aerodrom is a AirPlay/AirTunes receiver application for Microsoft Windows PCs. It let’s you seamlessly stream audio, videos, photos, and photo slide shows from your iPhone, iPad, iPod touch or Mac and PC to your Windows PC or notebook.
Better configuration options (service name, network, …)
Windows Media Ceneter integration with optional plugin AerodromMCE
iOS 5 compatibility
I haven’t tried it myself yet, but I will give it a go.Learn more and download from here