Some folks on the nh-users list (led by James Gregory) have moved Jeremy Miller's Fluent NHibernate project to Google Code.
There's a lot of work to do, but we have a list going.  Should be an interesting project to watch (and to contribute)!

If you are curious about Linq to NHibernate and want to quickly check it out, here is an easy way to do it.
Check out a copy of the CodeCampServer source (svn).  CodeCampServer is easy to work with because it has good tests on an already-working NHibernate implementation.
Check out a copy of NH Contrib (svn), open [...]

In this post I am talking about auditing for the business, not the technical infrastructure.  As an example story, users will want to see certain fields highlighted on a grid if that field has changed in the last week, and the info about the change (who, when, what) should be a tooltip for the cell.
Database [...]