So I'm not sure exactly when Bank of America added this "My Portfolio" feature, but apparently you can link up all your financial accounts to get your net worth online. It lets you tie in your investment accounts (I got Fidelity, Scottrade, and ING linked up), credit card accounts (liabilities), and other sites (PayPal and Prosper, even!). 

Not only can it glean information in one view, but it'll autologin you into these sites as well! I had no idea they were building such cool tools - this blows out of the water all those Web 2.0 personal financial managing sites that I tried out.

If you've got BoA, try it out. Just log in through your online login and you'll see a link on your account summary for "My Portfolio."