Tinderbox 2.4 has New Analytical Tools
Tinderbox has a bunch of new analytical tools. For example, right now there are 20.00 posts on the main page, with an average of 147.50 words per post. The longest post, right now, is 524.00 words long. These statistics are calculated on the fly, so they'll change as the main page changes.
There's nothing special about word count; I could use any numerical attribute, whether built-in or user-defined. And there's nothing special about the main page; I can get this for any container. The syntax is easy enough -- ^mean(child,Wordcount) gives me the average word count for all the notes inside a container.