Bank of America has a feature that will extract my account info in real time from various accounts to one central page. That page will then give me an idea of where I stand financially. If I wanted to add a feature similar to this (information not quite as sensitive) does anyone have ideas as to what I should consider? Or, for that matter, how to begin in this process?

My skills are limited and I understand legal considerations and privacy issues but it is just an idea I've thought about to enhance my site. Thanks for the suggestions.