Someone posting to the log4net list today had this site in his signature: http://www.dotnetx.org/ It looks similiar to IBatisNet's DataAccess project (closer to NHibernate). I haven't looked at any files yet becuase only .msi files were available from Source Forge.
The author of NLog: http://nlog.sourceforge.net/ has been working on Sooda (Simple Object-Oriented Data Access) for a while too: http://www.sooda.org/ It also looks similiar to NHibernate. It appears that entity objects must extend from a base class and that constructors on the entity objects must implement special 'SoodaTransaction' overloads. Complicated-ness blah!