http://nhforge.org/wikis/patternsandpractices/nhibernate-and-the-unit-of-work-pattern.aspx
http://msdn.microsoft.com/en-us/magazine/dd882510.aspx
http://www.primaryobjects.com/CMS/Article122.aspx
http://codereview.stackexchange.com/questions/5556/entity-framework-with-repository-and-unit-of-work-pattern-and-poco-architecture