Social Bookmarking in Plain English

Links for Social Bookmarking:
Social Marker
Wikipedia-Social Bookmarking
7 Things You Should Know About Social Bookmarking
5 Things You Need to Know Before Using Del.icio.us, a Social Bookmark
Del.icio.us and teaching - How one teacher uses del.icio.us with students
Edtags.org - social bookmarking for education (appears to be a tagging site for blogposts, not all weblinks)