The WordPress.com stats are probably the most used part of my dashboard... but they don't tell me a heck of a lot.
Here's a stats package (that we can't use with WordPress.com) that shows what is possible.
http://demo.firestats.cc/wordpress/wp-admin/index.php?page=firestats-wordpress.php
Check out the additional features:
- browser / operating system breakdown
- countries
- the hits table that shows you per hit live stats and you can filter on them
One thing that FireStats is missing that I would love to see is a detailed list of "internal referrers" -- the pages where people come to my blog and click on more than one page.
i think it would be enlightening