I found working through the 23 things a bit challenging. I think the interactivity of Web 2,0 is a good thing for libraries to draw on to create a community of users and to reach out to those who have given up on libraries as a source of information and learning. In my presentation on ideas for updating research guides I am suggesting using De.lic.ious tagging, podcasts on using the guides, and Libguides, which combines the features of wikis and blogs in software created specifically for libraries (it's not open source, but it is reasonably priced.) I would not have understood the latest research on creating library pathfinders and research guides without Learning 2.0.