I've never been a big fan of Facebook, not just because of their cavalier attitude towards their members' privacy, but also because the UI stinks. Thomas Baekdal takes a detailed and interesting look at the reason he thinks Facebook is dying. Some key excerpts:
Facebook is really big, it has a ton of features. But, it is also turning into the worst case of complexity overload the web has seen in years. There are so many inconsistencies that it is hard to believe - or even to keep track of.
On top of the complexity and inconsistencies, we have a growing problem of privacy issues. Facebook has a long track record of ignoring people's privacy. As I wrote in "The First Rule of Privacy"; You are the only one, who can decide what you want to share. Facebook cannot decide that, nor can anyone else.
But, Facebook seems oblivious to this simple principle, and have started sharing personal information with 3rd party "partners" - continuing a long line of really bad decisions when it comes to privacy.
If you are on Facebook with a personal profile this is a must read. If you're on it for business reasons, you might want to read it even more closely and pay particular attention to the various privacy changes Facebook have made. And on that note, the EFF has some great advice and information about Facebook's now very confusing privacy settings and interface changes.