You've reached the official Wiki for Fluent NHibernate.
Fluent NHibernate offers an alternative to NHibernate's standard XML mapping files. Rather than writing XML documents, you write mappings in strongly typed C# code. This allows for easy refactoring, improved readability and more concise code.
If you're new here you'll probably want to read our Getting started guide.
Any questions should be directed to the mailing list.