Morgan McLintic notes that Steve Rubel has moved to Edelman, and the most interesting part to me is the disposition of his blog:

He keeps his excellent MicroPersuasion blog following a buyout deal with his previous agency, which had a branded practice of the same name. Richard Edelman is pumped about the appointment too - as well he should be.

The blog was a valuable piece of "real estate", and it had to be bought out. I expect we'll see more of this sort of thing as time goes by.