If you are wondering how many cool features are coming in Entity Framework 5.0, the EF team wrote an awesome white paper on performance improvements and tips to get the best performance out of EF.  Please read the article here.

To me this article proves a great commitment that Microsoft as a company has to Entity Framework technology.  It is apparent that they not only add features to the technology, but also are very much interested in improving existing functionality as well.  You can read more about EF 5 on ADO.NET Team Blog.

Great work, EF team.