Doug Purdy announced that the Oslo and the Data Programmability team were merged.
Since I first heard of the Entity Framework, it was pretty clear to me that it was designed to be the 'Model' of the .NET Framework. Even if there were some disagreements over the EF programming model or their designers, the 'modeling' part of the story looked pretty well (even if I can still not map some fairly common scenarios (1)).
If Oslo wanted to drive ´Model-Driven Development' in the .NET platform, and if they took a very 'data-driven' approach, it made sense that they used the EF as their model.
It looks that in addition of fluent interfaces for the EF, we´ll have a way to define an EF model in M, which would be much better than the current XMLs. We´ll need to wait until PDC to find out.
As a side note, Oslo looks to be very far from it's shipping date.