I just completed preparing the lesson on this subject on the main Learning 2.0 at Sewanee blog. I have fiddled around with Del.icio.us and have a page there, but it doesn't have much on it. Eventually I would like to go through all of my favorites in my IE browser at work and transfer the ones I still want to a del.icio.us page.
There are pieces of code you can add to a blog account that publish your del.icio.us bookmarks on your blog. You can also add them to your profile in Facebook, I think.
I don't know what happened to the program in August. I guess I just got bogged down with other stuff and couldn't seem to get back to this project. But the Oct. 23 meeting deadline got me going on it. I have two more lessons after this one, and I'm trying to decide what to cover. There are three main topics that I had planned to cover: Podcasts and Video, Online applications and tools, and I really wanted to do an intro to Second World. I also left out Library Thing, which is very popular even outside of the library world. So... I have to choose. Maybe we can do a second round of these lessons later in the year and cover those plus other things. I have seen that the original library that did this, the Public Library of Charlotte and Mecklenburg County, has an ongoing extension of the program, called Learning 2.1. (This one is continuous and there are no prizes.)
Besides the topics above, there are things like social networks (including Facebook and Ning), Twitter, and lots of library-specific uses for the categories of things already covered.
If anyone is reading this, and has a suggestion about which two of the three remaining topics I mentioned they would be most interested in, please leave a comment.