Out of sheer curiosity (and a way to save server space!), I was curious if you had a time limit on how long a person's profile can be on the system and them not logging on before you delete it.  I know some people sign up, look around, and then never come back -- how long do you keep their profile online before getting rid of it?

we don't get rid of profiles. it wouldn't save anything to delete them. and who knows - maybe they'll come back some day.