This isn't about MS and what they want. They have created an *open system for others to plug-in 'providers' - postgres and sqlite have it - mysql is just laggin... but, good news for those interested, i too was looking for this and found that the MySql Connector/Net 6.0 will have it... you can check it out here:
http://www.upfromthesky.com/blog/post/2009/03/24/MySql-Supports-the-Entity-Framework.aspx