Finally! The first midtown location of big-deal Blue Bottle coffee has opened, at last, on the concourse level of Rock Center, just next to 'wichcraft. This means midtown suits and Tina Fey alike won't need to resort to ratpuccinos anymore, and Blue Bottle loyalists can take a break from the L train. Management tells Grub Street that, like all openings, there are a few unexpected glitches. No credit cards will be accepted today because of Internet problems, and until last night, they only had one working espresso machine. Most disconcerting (though definitely not a problem for long), the staff prepped for droves of customers today, and so far, BB is pretty empty!