I've created a spreadsheet that will pull in Adsense data from the web, and import it into Excel, and plot several graphs. Should work with versions > 2000.
It's not fully developed, I created it for myself, and then poslished it up enough for others to figure it out easily. Feature requests are welcome.
I just put up a page describing it and offering a download link. Seems that URLS are not allowed (I'm new here), although I couldn't find that specifically in the TOS.
So, assuming that, PM me for the link. Or, I can post it here once I get the policy clarified.
URL sent to: