Ah... it was news to me. Interweb reception isn't good in my cave, I guess. ;-)
Good point re: Google. They definitely have nice charts but I'm trying to not rely on Google for everything. I'm already using them for ads, maps, and AJAX libraries, but I don't feel comfortable putting all my eggs on one colorful Googly basket. That makes third-party solutions that I can host (like this one) especially attractive. Spread the love, and the risk...
Check out Google's Visualization API: http://code.google.com/apis/visualization/documentation/gall...
Click on the charts tab, you can even use the Google Finance chart.