Try this:
https://www.yodlee.com/newarch/index.do
It's the same people (Yodlee) that power the aggregation for Citibank, AOL, Yahoo, etc, but this is their independant site. So, should you stop being a Citibank, AOL, Yahoo, etc. customer, you won't be left out in the cold. They are great at aggregating financial as well as frequent flyer accounts. From the link, just click on "register now."