Graph your Gmail Inbox with GraphYourInbox

If you can't live without Gmail and would like to better visualize some stats about it, you'll definitely want to check this GraphYourInbox extension for Google Chrome browser.

With all the processing being done locally (none of your emails or data is sent elsewhere) the extension graphs and compares any search query you enter into Gmail's search box.
It actually kind of cool to compare how you email to some of your contacts or how important emails are distributed along weeks and months.

This is the kind of thing that I hope Google will implement in Gmail... eventually.