October 16, 2002: Plumb Design has updated their Visual Thesaurus. Version 2.0 offers a much-expanded UI. Perhaps most interestingly, meanings are given entries along with the words themselves, so that links between words can be seen more explicitly.
For example, one of the meanings associated with the word "explicit" is given as "precisely and clearly expressed" which is in turn linked with the meaning "describing nudity or sexual activity in graphic detail" which is associated with the word "graphic." So, rather than just showing that "explicit" is related to "graphic", we see fairly clearly how they are related.
On the other hand, the original Visual Thesaurus had a certain elegant simplicity that the new version lacks.