Spent three days last week in Webster NY at an internal Xerox Research and Technology conference.
I was part of a group presenting a Second Life project as well as providing information at a Libraries booth for the entire conference.
Well, it is my opinion that if you are always around people will remember you. If you are out of sight, you are out of mind.
I make a point of offering library services to everyone at every opportunity. The R&T conference is a perfect place, all the researchers in one place.