PageOnce is onto the ball about making a portal that accesses all your account on the web. From services such as banking, social networking, airline, email, and shopping accounts such as Citibank, Facebook, American Airlines, Gmail, and Amazon.
They haven't been able to gain relationships with all the services out there (as of yet), as not all services have an API to enable services such as Facebook to be able to login and modify data. However they are able to read your data from some of your services and then they provide you with the links to edit this data.
For more information, check out Techcrunch's Post here.