Google Orkut using ASP.NET?!

I might be wrong but how is this possible?
Just looked at Orkut, the google social network and look what i found:


Are they using ASP.NET to develop this application? Google? Anyone has answers to this mystery? If so share your information!

More data on the topic can be found here:

http://www.oliviertravers.com/archives/2004/05/05/orkut-an-aspnet-application-using-squid/

http://blog.techdreams.org/2008/04/google-orkut-is-powered-by-microsoft.html

Wikipedia article on the Orkut crator