No - I don't think they'll remove it. I was talking to one of their developers about the idea that they might make it public a few months ago, and it seems that they did.
It's always been public just not promoted. We made it known after Andy's talk at SXSW (grown up css, recommended listening) and after I chatted with Andy and Jeremy Keith who urged us and more companies to release their styleguides. We see this as invaluable tool for internal communications within our team as well as an industry trend (24ways, BBC Gel - both of which we're big fans of). The response has been overwhelmingly positive and for that we're proud and humbled as we are just trying to create the best websites we can for our customers.
My guess would be no... Starbucks I imagine is probably not a company who would be interested in letting people see how they do HTML/CSS on their website.
