Via the Mashable! blog comes word of yet another new Web 2.0 application, called Mobber. The idea for this is to enable you to see who is on a particular webpage, and to chat with that person or persons in real time. Could this kind of service be used in libraries to more directly engage those many anonymous library users who increasingly visit the library only via the library’s website? Just take one example: this would be a huge improvement over simply sticking in a link or graphic to a typical Ask-A-Librarian chat/email service.