This blogger was at Web 2.0 and discusses the services she has experimented with, including Omnidrive, Klostu, and Hummingbird. She would use Instructables - it "provides "step-by-step collaboration." Users can post their instructions for any sort of crazy project." Make sure you are selling productivity - what the connection to the Internet can do for you. Web 2.0 is all about ways to use the BB circuit. Maybe not Killer Apps, but value adds for sure.