If you want to play with the next generation of ADO.NET, now's your chance. The ADO.Net team has released the August CTP for download.
The bits are young and fresh but they give you an idea of where Microsoft is heading. I can't commit to a timeframe, but we are working on the next generation of our .NET provider which will be compatible with vNext.
Note: The May LINQ CTP is a pre-requisite.