In the "My Portfolio" section, Google has added upcoming events for the stocks you have picked.

Also, I think this "Historical Prices" feature is new, but I'm not so sure:

http://finance.google.com/finance/historical?q=GOOG

yeah this a neat calendar feature that is cross over into finance!

Official post here:
http://googleblog.blogspot.com/2007/05/some-updates-from-google-finance.html