[whatupwilly]

CashEdge supports aggregation as well: http://cashedge.com/products-financial-information.php

A PFM solution called HelloWallet uses them: http://www.hellowallet.com/2010/03/09/alldata-account-aggreg...

I can't speak to the quality or cost of the API though.

I do know (as an ex-Yodlee employee) that the Yodlee bank API, although not extremely intuitive, is very powerful and heavily used by a lot of institutions.

Will -ex-Yodlee (04-08) -Freelance Yodlee Consultant (now)