Axel Nennker is calling out Google and Meebo for the privacy aspects of the new XAuth spec.
Peter Yarid has some thoughts here, but criticizes it more from a business than privacy standpoint.
Techie-buzz has this candidate for the understatement award:
There are of course privacy implications because not every user would want every website in the world to know what social networks it uses.
Gee, you think?