The Cafe on the 2nd floor of the Virgin Megastore on Michigan Ave now carries Ethel M chocolates (I believe they started carrying them a few months ago).
The Ethel M dark chocolate lemon and dark chocolate raspberry satin cremes are, in my opinion, two of the best chocolates around. Their other stuff can be hit or miss, I think.
Ethel M is based in Vegas and outside of Nevada I believe there are only a couple of places in the country where you can get Ethel M's in person (though you can mail order from anywhere, of course). Fortunately, the Virgin Megastore on Michigan Ave is now one of them.
I highly, highly recommend you check out the dark lemon and dark raspberry chocolates if you are in the area. We swung by after a sort of disappointing meal at Caliterra and grabbed some chocolates for dessert. Delicious.