Rob Conery has had his open source ORM/MVC code called ‘SubSonic’ around for awhile. I must say, the documentation, tools,etc… are excellent. He has released beta version 2.1. The new release has a nice ‘LINQ’ type query language (fluent interface style).
The latest tool is SubStage – which helps configure the ORM aspects of SubSonic. Tooling like this makes the job easier.
Read more here.