I don't know if you've seen them, but I really enjoyed the video tutorials for the Reactive Extensions. I don't mean the studio quality film editing, just the short, definitive tutorial style. Their hands-on lab was also really good and was the first thing I tried when I started learning. If you have more time or want to start with an outline and let others collaborate, you could follow the wikibook format and use the Lively Wiki to both teach and allow people to learn through contributing. :)

Ryan