I didn't post a comment on the 23 Things site; I'm placing it here instead. I've enjoyed this experience because it was engaging and "hands on." There was certainly a lot of information to absorb, but its presentation was well-planned and easy to navigate.
It was great to be able to explore 23 Things in the context of a class; I'm not sure I would've taken the time to explore it so thoroughly if left to do it in my own time-frame! This reinforces to me that my own staff needs to continue to be given work time to explore technologies and to improve their competencies in all pertinent areas of library work and customer service.