Idea for a plugin

Something I’d love to see…

There have been a few examples of the flickr-style “heat map” implemented as WP plugins. This is great, but so far these only show activity for categories and archives.

What I’d like is a plugin that does the same thing for post text. As options, I’d like to be able to select (1) post only, or (2) post and comments. Also, I’d like to be able to specify a list of “noise words” that I don’t want represented in the list.

Finally, I’d like the words shown in the heat map to have the same permalink structure that I’ve chosen for the rest of my site.

Anyone else think this would be a good plugin? Any other ideas for functionality?