From Wikipedia Del.icio.us (pronounced "delicious") is a social bookmarking web service for storing, sharing, and discovering web bookmarks. The site was founded by Joshua Schachter in late 2003 and acquired by Yahoo! in 2005. It has more than three million users and 100 million bookmarked URLs.

Why del.icio.us?

It is an online bookmark so you can find all your favorites no matter what computer you are on. It also has unlimited capacity and will categorize everything you tag.  You can also find out what others are tagging, see what's the most popular, and look at who has tagged your site.

Here's a delicious tag on classroom blogs.
 

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