Browsing the TechEd event site - a lot of application and services are available. Most based on ASP.NET.
Also Exchange is running. I am quite surprised that its still the "old" version. Anyway i have my personal email address emeahannesp@mseventseurope.com
And i post it here to see how much spam i have after the TechEd in my inbox.
Tip: take a look at the global addressbook