NHibernate.Burrow is a light weight middleware developed to support .Net applications using NHibernate (maybe also referred as NH in this article) as ORM framework by providing advanced and smart session/transaction management and other facilitates. Documentation and examples are available at NHForge.net.  
Any feedback or issue can be sent to NHibernate user group(http://groups.google.com/group/nhusers) and will be greatly anticipated.  
1.0.0.CR 1 is updated to NHibernate 2.0.0 GA. 
Here for download.