A couple of people at work do, just because I'm online there sometimes. One saw my username, but I highly doubt he reads my stuff, nor would anyone else. I'm not that interesting. I'm pretty sure they don't even know or remember the name of this site. They're just happy I have somewhere "to go" for support. I believe I told my T when I first started seeing her, but can't remember for sure. I guess I'm pretty open about my bp at work for the most part since I haven't had any negative responses (at least not to my face). And as far as telling other friends, well there hasn't been any reason to do so, plus I don't have many to begin with so I'm kind of limited anyway.
As far as purposely telling anyone, I don't know anyone that would be interested to even know. It has come up in conversations when I'm in an episode, but I usually say I post on message boards to help me when I need it.