We still don't know what Barnes & Noble is announcing at its "very special event" next week, but the company has just made another fairly big announcement: the Nook will be hitting the shelves at some 2,500 Walmart stores beginning "as soon as" October 24th (in addition to Walmart's online store). That includes both the 3G and WiFi-only Nook models, and some Walmart stores will even have a "Nook-branded eReading area" where customers can try out the device. Head on past the break for the complete press release.