The documentation for Sinan goes apace. I have finished all of the user level documentation and have started the developer documentation.
Why worry about developer documentation? Sinan is a very pluggable system. Most of the current functionality that ships with the system is composed of tasks that are plugged into the engine. Third party tasks will use the exact same mechanism and be first class parts of the system right along with them. I think this is pretty darn important and I want to support it right out of the box. Thats why I am spending a bit of extra time and getting the developer documentation out with the user docs.