By Michael van der Galien Facebook is supposed to be one of the most innovative social networking websites on the Net. It is, at the very least, the biggest — by far.But for how long will Mark Zuckerberg’s Harvard project remain number one? It’s a fair question to ask now that the changes Facebook announced Thursday at its f8 conference are being criticized by virtually everybody — except for Zuckerberg himself, that is.When Google+, the new social network of Google, was launched, many were critical. The criticism disappeared at the very moment people starting using it, however: all its new...