Samuel Castro Ponce writes [es] on Infotecarios about reference services [es] or librarian consultaton, history, features and evolution:

Evidently, synchronized referece services are evolving. Now there is a trend of using 2.0 websites for taking advantages of social networks that make possible sending and receiving information instantly. The same goes for the new services on cellphones some libraries are providing, that use keywords for enquiries, i.e., users start a text message with a specific term to get concrete answers or to get instructions and submit their enquiries to an appropriate department