The joint async talks that Jon Skeet and I presented at CodeMash are now live on InfoQ. Jon and I co-presented two hours of content on the C# 5 async features: Part 1, Part 2.
If you want to experiment with the code (or the slides) while watching, all the samples are here on BitBucket.
Of course, the current VS11 / C# 5 software is a moving target. When we spoke in January, we were working with a pre-beta CTP of VS 11. The sample code reflects that drop of the upcoming release. Jon has written a recent blog post in his EduSync series that describes the changes (some public, some private implementation) between the VS11 preview build and the VS11 Beta build released in March.
Happy async coding!