Here are a few quick announcements about ADO.NET providers supporting the Entity Framework. Enjoy!
Core Lab (Connectivity to Multiple Data Stores)
Core Lab was the first ADO.NET provider writer to support Beta 3 of the Entity Framework. Their provider includes connectivity to Oracle, MySQL, PostgreSQL and SQLite databases. For more information, see the announcement on the following pages: http://crlab.com/news/2007/directs430.html and http://crlab.com/news/2008/dcsqlite100.html.
IBM has released a public beta for their ADO.NET provider that works with Beta 3 of the Entity Framework. For more information, see the announcement on the following page: http://www-128.ibm.com/developerworks/forums/thread.jspa?threadID=203893. IBM also demonstrated their provider in an end-to-end application building scenario using the Entity Framework designer at recent VS Live conference in San Francisco.
At the recent MySQL conference in Santa Clara, Reggie Burnett and I co-presented a session talking about MySQL, LINQ and the ADO.NET Entity Framework. As part of the session, we demonstrated using LINQ, Entity SQL and ADO.NET Data Services to access a MySQL database using Beta 3 of the Entity Framework.
Note: Big thanks to Reggie for helping to make this demo work even after injuring his knee. Get well soon.
Npgsql (PostgreSQL connectivity)
Npgsql has released a beta of their PostgreSQL ADO.NET provider that works with Beta 3 of the Entity Framework. You can download the provider at the following page: http://pgfoundry.org/frs/download.php/1730/Npgsql2.0beta3-bin-EntityFrameworkBeta3.zip. For more information on the release, please see the following page: http://pgfoundry.org/forum/forum.php?forum_id=1307.
ADO.NET Program Manager