My favourite 3rd party WebUI control provider Telrik just released its new ORM product called "Open Access" - http://www.telerik.com/products/orm.aspx. I didn't realise they were developing such a thing - but it turns out they just acquired German company Vanatec that specializes in ORM products. They have performed a few updates to the original Vanatec software since they acquired it (such as removing a dependency on J#) - so they have grabbed this product and are running with it full steam. If the quality of their controls is anything to go by, this could be a valuable asset in any .NET developer's toolbelt.
I'm going to try it out and evaluate it against some of the custom LINQ, LINQ to SQL and Nhibernate-based efforts that I've created and worked with on previous projects. It also supports non-SQL Server databases such as Oracle. Now there is also a fledgling Codeplex project called LINQ to Oracle http://www.codeplex.com/LinqToOracle) but this ORM product could shoot it out of the water. Telerik Open Access also supports direct SQL. I'll do a a review before the end of the year.