While interesting, we think it’s highly unlikely that Facebook will implement either service. The main issue is that Facebook rarely goes above and beyond to support competitors despite having the upper hand. At this point users are limited to logging in with Facebook and Yahoo!, most likely a result of the partnership forged over a year ago. Facebook also doesn’t consider Yahoo! to be much of a competitor, especially with Carol Bartz at the helm.
While it should never be ruled out that Facebook could turn the other logins back on, the battle between Facebook and Google appears to have resulted in the open web movement being partially hijacked by fighting between the companies.