One more tool that works with del.icio.us: gre.gario.us. The idea seems very cool: find people with the same interests using your bookmarks. Didn’t work with my username when I tested but worked with joshua(Joshua Schachter) and joi_ito (Joichi Ito). To know more read the about on gre.gario.us.
Update: gre.gario.us is closed.
It looks like gre.gario.us got too popular for its own good; with the amount of people checking out similar users, del.icio.us received a bunch (too many) calls from this page. I tried to program it to be as nice as possible, but it still required some work from del.icio.us.
So what’s that mean? Well, gre.gario.us is closed, at least for now. Hopefully a gre.gario.us-like functionality will be built into del.icio.us soon when there’s more bandwidth and more powerful servers.