Essentially, do you want to change the world with Gotdotnet? Do you want to work only on the latest .NET Framework? On 64-bit servers? Innovate with a small team? It's not for the timid, trust me:

http://members.microsoft.com/careers/search/details.aspx?JobID=49585a06-a92e-408e-a246-ece6cdb984c6