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?

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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 LinqToSql has more or less been superseded by EF in .NET 4.0, so I don't think you can really go wrong with EF.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.

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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