Scott Guthrie (left), Corporate Vice President, .NET Developer Platform, Microsoft Corp., shares a laugh during a post-keynote "Ask the Gu" Q&A session with Jeff Atwood of StackOverflow.com and Jeff Sandquist (right), Senior Director of Evangelism, Microsoft, during MIX09. Questions from the session came from viewers and attendees via Twitter. Las Vegas, March 18, 2009.