Social bookmarking

I was on Digital Point today & found a simply FANTASTIC resource for social bookmarking... while there are FAR too many for me to join on my own, I still thought that it was a pretty good set which I've shared with the forums in a plea to help the OC grow.

I'm already a member of del.icio.us and of Stumble, both of which I adore! I'll need to check out DIGG, FURL, and Tecnoranti(sp?). Possibly a few others, but I certainly do not want to be overwhelmed with "bookmarking" when I already have more then enough for myself.