A lot of people are using tag cloud or keyword clouds these days. Many websites provide free tools to create these clouds. ToCloud.com has used it’s log of the websites that have been converted to keyword clouds, for each of those websites, got the number of bookmarks on del.icio.us and then plotted it as cloud of clouders.
Is this “cloud of clouders” a tag cloud or a keyword cloud? I think it’s neither. Because, tag clouds are based on tagging while keyword clouds are based on converting of text within a page, article or book. However, a cloud created using the names of an entity with some metric of those entities as cloud frequency can probably called as “metric cloud” or “statistical cloud”.