Learn NHibernate - Screencasts, docs
Well if still don't know what is NHibernate or think that SQL Metal is the only tool that can map you DB to solid object model, this post is for you.
I'm not going to talk about Microsoft solution to ORM because it's wide spread and receives quite a lot of spotlight, I think it's important to know the alternatives for the needed framework in order to achieve better solution for the problem at hand.
So...
NHibernate has very extensive help online (and pdf), you can download the 2.0 beta version here.
In addition I found a great site with screencasts and code examples - called summer of nhibernate.
Another post is how to configure log4net with Nhibernate (checkout my appended - multi threaded, buffer, rolling all in one appender).
Expend your knowledge...