I like IMing and I think it’s a really great way to contact patrons, especially if there’s a widget in the library catalog or on the library webpage. If a person has a question about something, they can just use the IM widget and contact the librarian then and there rather than getting their thoughts together for a formal e-mail or calling and getting a busy signal. An IM message can pop up and a librarian can use an automated response if they’re busy and let it sit for a minute, rather than a phone call that has dead air time or cheesy phone music. It’s also the perfect device for very simple questions. I think the people who use IM on a regular basis know that it’s a tool for quick conversation and not a complicated reference question. I’ve used AIM since I was about 12 or so and find it completely intuitive and easy to use. Text messaging has similarities, but I don’t know if the library needs to respond via texting on a phone. You can text message (in some instances) from phone to computer, so perhaps let your patrons aware they can do that.
Web conferencing is a really great (and economical) way for libraries to see parts of conferences or presentation without attending physically. If one is watching a pre-recorded conference, one also has the ability to pause, fast-foward through boring or irrelavent sections and get up for a drink of water without feeling rude. We watch them sometimes at work or in class and parts of them are quite useful. Always, ALWAYS try setting up before the designated time, though.