Are any major applications using Entity Framework?

I'm investigating the use of Entity Framework in an upcoming project, but I have some concerns about the maturity and market adoptio开发者_StackOverflown of the product. Are there any high profile web sites or applications using the product? Are there any significant open source projects that have picked it up?

SO is built on top of LinqToSql, which shows that LinqToSQL is quite mature. LinqToSql has more or less been superseded by EF in .NET 4.0, so I don't think you can really go wrong with EF.

We've also been been running a commercial website based on LinqToSQL and am currently in the process in moving to EF.

I eventually ended up talking to a person on the EF team at MS. He pointed me to some case studies that are on their website. Best info I could find on this subject.

http://msdn.microsoft.com/en-us/data/ff625830.aspx