Google AdSense has program terms which makes it a bad idea to share your AdSense data with other people. While a site such as AdSense Charts may be fun to use, it would require some real trust for me to use it.

Eventually Google will add features like this chart to their AdSense program, but I do not recommend submitting your data to any third party website, even if they have a privacy policy.

Here is the Google AdSense Charts privacy policy
"We firmly believe that your data is yours and yours alone. Our scripts generate charts from your pasted data but we do not have access to your inputs. The only other information that we collect from our users is aggregate traffic analysis; that is, we monitor how many people visit our site, when they visit our site etc."

And here is their About Us, which seems rather admirable if it is true
"We are web publishers who use and love the Google AdSense program but we are not affiliated with Google in any other way. We believe that Google and the AdSense program has the potential of reviving some of the luster of the internet's early days. With AdSense, great content is rewarded and publishers can recoup some or all of the expenses associated with their sites. AdSenseCharts.com was developed out of our own need to keep a pulse on the success of our AdSense ad placements. Sure you can copy and paste the data into a spreadsheet, but we are sure that you'll find that AdSenseCharts.com makes the process much easier - just a ctrl-A, ctrl-C and a ctrl-V! "

I looked at their site and did not see any upsell or attempt to gain profits from it. This leads me to wonder how they are paying their AdWords ad bills...