Add Google charts and graphs to your WordPress site based on tallies of any numeric custom field over time. Visualize progress toward any goal.
You can get by with very little techyness, just WordPress custom fields and shortcodes. They're really not bad - look over the Usage section under Other Notes. It's not a point-and-click interface either, but it is easier than building your charts from scratch.
If you do want to get adventurous, you can have fancier charts in more places.
As of WordPress 3.3 you must check a box in the "Screen Options" area in the upper right of the post editor page to make the custom field interface appear.
Sure, just send email to email@example.com.