Later I realized that Google Finance is using Flash for their chart (boo!) so the playing field is not quite level.
There appears to be a lot of activity in this area (many of the packages listed are pre-1.0) so perhaps this is a case where procrastination will pay off.
Sadly, I cannot seem to find a link to the paper I remember reading that showed that procrastination can be effective when purchasing a compute cluster to work on a particular project. A cookie for any CSDLer that can dig it up! 🙂