My main bank account is at Fidelity, which has no local branches. So when I need to get money out of an ATM, I can choose any one I want. As of late, I've been going out of my way to use Wells Fargo ATMs. Why? Because I'm a design geek, and Wells Fargo has recently rolled out a new UI design for their ATMs. (Well, it has been over a year since they started the roll-out, but I only just noticed it.)Holger Struppek was the lead visual designer on the re-design project and has a great article documenting the process. Of course half the reason I love the new design is because the font they use throughout is Myriad (the same font used by Apple for its corporate brand). It really makes the whole UI feel a lot fresher and cleaner.
So at least for me — admittedly not your typical banking consumer — the commodity world ATMs has been differentiated by good design and it has turned me into a customer. Do you know of any other commodity products differentiating by design? Leave a comment!

They also use WPF (Windows Presentation Framework) for the ATM.
I love the deposit scanning for checks and cash.