I use delicious to keep my bookmarks synced between several computers that I use. Do you use it? Check out this common craft video explaining what this is... I'd like to use the social part of this tool more...
I love del.icio.us. I took a workshop with David Jakes at NYSCATE in November and he showed us how to set up a network, which I've done, and how to subscribe to tags, which I've also done. However, after a hot and heavy start, I drifted into my day to day and haven't really explored the possibilities here to the degree that I probably should. The summer looms ahead, so perhaps I'll tinker with it while I'm hanging out in the shade of my yard.
True -- the social aspect I've left alone even though I can see its power and can imagine where it would work in our work (creating a keyword and working collaboratively on finding resources is one way I can imagine it working for us).