I do have a FB account.
I've cut it down from 40 something friends to 14 this last week.
I pretty much just like pages from music/recording people and companies.
Things like API, Neve, SSL just for drooling purposes.
Also people like Tony Maserati, Eddy Kramer, Rupert Neve, Charles Dye, Dave Pensado and the like.
They post on what their up to and offer up some tips.
Loads of other recording info and tips floating around there too.
Some good reading if you weed out all the crap like people posting endless photos of their kids and drunks posting where they plan on puking this evening.
Mike