If you work with Microsoft development tools and you haven't subscribed to Scott Guthrie's Blog, stop whatever you're doing right now and GO SUBSCRIBE!
This is hands-down, the single best source about upcoming Visual Studio features you're going to find. Scott intros the new tech, breaks it down, and shows how it works. His recent entries on VS 2008 are great material for composing the "why we should upgrade" memo you know you're going to have to write.