Zoomclouds is a service that lets you generate a tagcloud from an RSS feed:
Tag clouds are cool, informative, appealing representations about what's happening in your blog, or anywhere else.
With ZoomClouds you can put in a matter of minutes a tag cloud in your site, based on whichever RSS feed you like.
You can define height, width, colours ... the entire look and feel of the tagcloud.
When you're done, you get the code which you then can post on your blog, or website.
As an example I've created three clouds, spanning a 7 day period. One for my column, one for the main page of Newsvine, but just the Wire part, and one for the main page of Newsvine, the Vine part. You can see the result at your right.
When you click a tag, you get taken to a page with the most recent articles / seeds mentioning that specific word.
If you want to have a look for yourself, without immediately signing up, you can do so at the sample page for Newsvine - Irma.