I can't believe that I didn't mention this before. I am partnering with Skills Matter to create a course about using NHibernate.
You can see the full details here.
The first run is in London in May, followed by Norway in June and London again in August. After that I stopped tracking, but it is very frequent.
This is a three days course that is meant for developers who want to get into NHibernate. I am going to assume zero NHibernate knowledge and take you to the spot where you can build NHibernate applications on your own.