Jason Prickett has recently written a good article on the new Build definition window in VS 2010 - it's now dockable! It also has a new CI type named Gated-checkin. So developers need to have a green CI before they can checkin. Cool. I have been checking this new Gated-checkin feature out in the RC version recently, and I'm not sure it is working correctly. But will write back soon on my findings.