Windows Live developer platform services: Source code free to download
In order to highlight the features of the Windows Live developer platform services we have developed a number of social networking sites featuring Windows Live, Hotmail and Messenger contacts data, Silverlight Streaming, Windows Live Spaces, Virtual Earth mapping, Windows Live Search, gadgets, authentication and much more.
So why not download free the source code! Once you have this you will also be able to build your own site
quickly and easily and choose which Windows Live elements you would like to feature.
See here for the MS Site.
Is this another step in Microsoft's plan for open source software?