Barnes & Noble and AT&T already went ahead and offered free WiFi to iPhone users (and everyone else, albeit inadvertently) last year, and it's now finally gone and given up on those pesky subscription fees altogether. As the pair of companies jointly announced today, that new and welcome change is now already in place at all Barnes & Noble stores in the US that offer WiFi, and the bookstore is not-at-all-coincidentally taking advantage of the opportunity to promote its recently launched eBookstore, to say nothing of its fort