Sometimes referred as Integrated Query Framework, sometimes as Language Integrated Query, or maybe as Common Query Runtime (this one is foggy in my mind).
Whatever the name is, this new .NET feature is coming out more less the way I hoped it to be.
UPDATE: I found that the original post in jpox.blogspot.com has been deleted. I guess it was not correct information or maybe the author decided to help keep the secret.
We will see soon anyway.
UPDATE: Updated link sent by Joris. Thanks!