What exactly IS a ‘Tag Cloud’? Here is some explanation from Wikipedia…

“A tag cloud (or weighted list in visual design) is a visual depiction of user-generated tags used typically to describe the content of web sites. Tags are usually single words and are typically listed alphabetically, and the importance of a tag is shown with font size or color…The tags are usually hyperlinks that lead to a collection of items that are associated with a tag”

A history of the ‘Tag Cloud’ can also be found on Wikipedia…

“The first use of tag clouds on a high-profile website was on the photo sharing site Flickr, created by Flickr co-founder and interaction designer Stewart Butterfield. That implementation was based on Jim Flanagan’s Search Referral Zeitgeist, a visualization of Web site referrers. Tag clouds have also been popularised by Del.icio.us and Technorati, among others.”

What are some ‘Tag Clouds’ that you’d recommend (especially ‘book’, ‘computer’ or ‘Internet’ ones)?