I guess I should have said that I was at a job fair. I realize that I could have emailed my resume to the company before or after the fair, but I wanted to leave the recruiter with something tangible to both indicate my interest in their company and to display my relevant skills.

However, your comment has prompted me to send an additional, electronic version of my resume to all the companies I gave hard copies to. It can't hurt, and it might give it additional visibility.