Mobile Banking on AT&T (click opens iTunes) from Firethorn Holdings, LLC is exactly that -- an iPhone app that gives you full control over your money at 50 different banks nationwide. While the majority of the banks listed appear to be in the southeast USA, several nationwide banks including Wachovia, SunTrust, and USAA are participating in the program.
I was pleased to see that my business bank, FirstBank, with brick and mortar banks in Colorado, Arizona, and California, was one of the companies on the AT&T list. You need to sign up through your bank's secure website, enter your iPhone number, pick a six-digit PIN, then perform an authorization from the device using a code displayed on the website. Once activated, you can see balances, make transfers, and pay ebills.
What's your favorite iPhone banking app? Or have you moved all of your funds to a coffee can buried in the back yard? Leave a comment!