WordPress.org

When and how are the stats updated?

Whenever you edit or add a new post or page.

How are pages handled?

v0.4.3 of the plugin counts pages as posts. A future version will likely separate pages and posts.

Where can I find beta versions of the plugin?

The [TD Word Count Official release page]: http://www.tdscripts.com/wp/tdwordcount/

contains the absolute most recent version. The most stable version version will be released in the wordpress.org plugins directory.