Over at the Pollywog blog, Devon writes:
Her suggestions are hard to top, but I'll try anyway:
The Money Pit
Onion Bank (slogan: You'll Cry All the Way!)
Three Mile Savings & Loan
You can play, too. For inspiration, you may want to look at the FDIC's list of failed banks, updated regularly, which includes potential parody fodder such as MagnetBank, Haven Trust Bank, Integrity Bank, and Downey Savings and Loan, the last of which, come to think, is now a descriptive name.