Comment Some similar, less expensive projects (Score 1) 74
The MiniPwner is a similar device built on a TP Link TL-Wr703N router, so you can build one for under $40. http://www.minipwner.com/
Also Hak5 has had their Wifi Pineapple available for a few years that is similar, however their MarkIV version which should come out really soon I think will trump both the Pwnie Express and the MiniPwner. http://hakshop.myshopify.com/products/wifi-pineapple