I haven't put up a profile because of privacy/security concerns, nor a photo because I need to lose weight! (Actually I'm in there somewhere from when Bill Sables & Alan visited the West)

What I've always thought would be neat - although I know technically it's probably impossible - is to have a little photo of the posting Mudcatter appear just near the Subject, From, Date header at the top of each message. Then you could get a feeling you were actually conversing with a person (wouldn't really need the profile).