Sager flags an interesting chart on Facebook's social clusters (above) while Katja Grace considers Facebook social conventions:

People who talk about themselves a lot are generally disliked. A likable person will instead subtly direct conversation to where others request the information they want to reveal. Revealing good news about yourself is a good sign, but wanting to reveal good news about yourself is a bad sign. Best to do it without wanting to.

This appears true of most human interaction, but apparently not of that on Facebook.

Joanne McNeil bashes the website:

Facebook epitomizes filter failure for me. Yes, there are ways to segment information and keep groups, but there aren’t very good ways to keep worlds from overlapping. Facebook isn’t a more neutral LinkedIn and Myspace. It is the collapse of LinkedIn, Myspace, and a bunch of other networks, while many people want these worlds compartmentalized. I mostly avoid Facebook the same way that I’ll get drinks on a Monday night with colleagues, but not on a Friday or Saturday night.

One of Fallows' readers gives the site a second look:

I'm more selective [with Facebook friends] now, and am comfortable with it as a gratifying reminder of my own history.  It now includes people I was (and am) very fond of, but whom it wouldn't make any sense for me to be emailing - we've reasserted our goodwill towards each other; I am glad to know tidbits of their present lives, some of which I pursue independently, and to occasionally hail each other over some entry.  It's a cushion against loneliness, and against investing too much in some particular, immediate relationship.  It makes me feel part of a carefully crafted whole, sustainable since its give-and-take is very lightweight.  Its usefulness is just different from other approaches to socializing, in an unexpected but pleasant way - like an interactive, ever-updated scrapbook.

Bonus Facebook chart porn here.