Neither holds a candle to, say, The Tattered Cover, but unfortunately there's no Tattered Cover where I'm living now... :(
http://search.barnesandnoble.com/booksearch/store.asp?EAN=97...
which is the result page for a PHP book including store inventory search option. I've then been able to manipulate this into a general store inventory search with some success. Completely ridiculous that you cannot find this easily. No, it's beyond ridiculous.
Edit: apparently most -- but not all -- book results pages do have a "pick me up" slot where you can search a local store. Not exactly intuitive, but at least it's there now.
(well, that and their air-conditioning on hot summer days when I didn't have any. Of course, with the amount of money I always spent there during those days I could have bought a window-unit AC in two visits, but I like books...)