It's cool that you can see the site-wide badge award counts on the badges page. How about adding something that shows site-wide rep stats, like total reputation accrued by all users — maybe a graph of that over time — or total numbers of upvotes/downvotes cast, bounty rep paid/awarded, &c.?
To clarify, you are not asking for a page that would show your stats across the different sites, but instead you are asking for stats on the entire userbase of SO in one place. This would be a complement to the Badges page, which shows how many of which type of badge have been awarded to users on the site. Your page would show:
Though this might be an interesting feature on the site, I dont think it will rank high on the list. Dont let that get you down, though. You will be pleased to know that you have the ability to query for these stats already. There are two sites out there that offer access to the free data dump without the need to import it into a database for querying on your own: