I gave IBM’s data visualization tool Many Eyes a shot.  Very cool.

The tag cloud visualization shows the most common words used in the JavaRanch/CodeRanch forum names and description.

Unsurprisingly, words like Java, certification and discussion feature prominately.  In two word mode, “sun certified” was the clear leader.

I have no doubt that other data sets would be more interesting.  It’s a nice tool to explorer.  Free to use with the only caveat being anyone can see your data/visualization.