I’ve been using del.icio.us for quite some time now. I’m even geeky enough to have my actual name as my username on it. Look under Angela for my bookmarks.
A new FireFox extension came out today that makes using it even easier…and I didn’t think it was possible. Now you can search your tags as part of the browser rather than loading the site. Get del.icio.us Bookmarks and try it out.