I work from home. I generally wear a red fuzzy bathrobe.

You might be amused to know, though, that if I know I have to talk to people on the phone that day (press interviews, conference calls, whatever), then I get dressed -- not in anything special, just whatever, slacks and a blouse of some kind. While I can do my internet based job and chat with people in text in a fuzzy red bathrobe, I feel awkward and unprofessional if I do that on the phone.