Well, I actually think it's pretty clever.
So, upon logging in the first time, you get an hour of access at Caribou Coffee. Now, after that hour expires, you need to get a new access code, which requires a minimum purchase of $1.50. So, in other words, you have to get off your butt and buy something so as not to loiter.
So, technically, it's not free wi-fi. I'm going to need to do the math here. How much does internet access at another coffee place cost? Say, $30 a month. Now, if I'm coming in here and paying $1.50/hour for internet twice a week for 5 hours a shot, that's $15/week.
Of course, coffee costs more than $1.50 per cup. It's not like you get an access code for every $1.50 you spend, either. Something tells me that this could get expensive. Technically, I don't need internet access when I write, but it's nice to have the option to research what I need to research (or bitch on my blog about this, that, or the other thing).
So...my next stop is Panera Bread, probably tomorrow. They offer free wi-fi (or so I'm told) in a progressive restaurant atmosphere. Grab a sandwich and some iced tea and tap at the keys. Caribou is nice, but I'm a poor white boy who has been spoiled by the generosity of my last coffee house.
Plus, this place is way too cold. Turn down the A/C!