The ubiquitous librarian just posted to his blog about an interesting method of "reference". In his post, he explains that students at Virginia Tech who use one of the popular computer labs on campus have red cups that they can put on top of their computer that means they have a question or need help and the TA or whoever is staffing can come over and help them out and answer their question.
It's an interesting idea and I've been thinking about it all afternoon. I don't think it would be feasible for us as we aren't monitoring what students are doing (for the most part), nor can we see every work station around the library. But I think the whole idea of being like a waiter to the students would be a great way to increase our visibility- if anything we would be able to solve computer specific issues for students. And of course, now that I'm writing this I'm laughing to myself thinking, "didn't we go to grad school so we wouldn't have to wait tables?..."