[ceejayoz]

> As a marketing exercise alone it could be worth a fortune if it ends up putting Square's branding in every Starbucks.

Very much so. People who see a Square dongle at the farmers' market will now go "oh, I saw that at Starbucks", not "that guy might steal my credit card with that".

[jeffgreco]

Starbucks won't be using any Square dongles. I'd imagine there will be a small sticker at their normal POS. src: http://www.splatf.com/2012/08/starbucks-square-payments/

[ceejayoz]

Whether it's a dongle or a logo, the benefit is still essentially the same - recognition of it as a payment brand on par with Visa/Mastercard.