It’s probably not the most brilliant observation but it just came to me today that Facebook is basically LiveJournal, only with more adults and fewer kitty animated gifs. The more they play with friends and groups, the stronger the correlation becomes.
Not sure if this is a feature or a bug.
Also, the upcoming profile thingers due to arrive on Thursday are pretty much what would happen if you put the entirety of web 2.0 hype into a blender and put it on chop for a few seconds.
Again, not a novel insight.