I'd really like to know about your experience with Spark View Engine. I'm currently using it and find myself writing a tool to upgrade the codebase to .NET 4.0 so that my views will work with .NET 4.0 on any changeset of Spark. While this all works, I'd like to heard the painpoints and good points for Spark in C9.
I'd also like to heard a lot about your implementation of Azure. Some developers (like myself) are interested in Azure but find it a bit too expensive to play with at present. What's the full story on Azure with C9? In particular, what are the specifics of the caching mechanism? Do you have a special implementation for video encoding running on Azure?
Basically, I'd REALLY love to dig around the code until I'm blue in the face 
