While this is a stupid error on their part, I have to say that I'm impressed with DreamHost's response. I was affected by this, but they corrected the error before I even noticed it.

Everyone makes mistakes sometimes, and this one was a doozy -- but they admitted their fault and fixed it right away. How many companies will give you your money back so quickly once they've got their hands on it?

Ever tried to get Verizon or Comcast to fix a billing error? Even when they do finally admit they made a mistake (after sitting on hold for hours on multiple calls) they still make you jump through hoops to get a refund.