i have heard a lot about NHibernate so finally decided to have a look at it and decide it by myself.
I did some gooogling and read some of the articles about it .
Finally i have found a nice article originally written by Gabriel Schenker here
I really like the article and did the sample by myself. thought there are some bugs in the sample and i corrected them and finally i was able to test it with NUnit also.
You can download the source code form NUnit Test Here.
Update : Sample with test app can be downloaded from Here