Here you go. How bout $1.46. This assumes of course that your project has USB and you know how to handle the Ralink chipset. If not, just buy the TP-Link 703 an

Here you go. How bout $1.46. This assumes of course that your project has USB and you know how to handle the Ralink chipset. If not, just buy the TP-Link 703 and hook it to your arduino. http://www.amazon.com/SANOXY-USB2-0-Wireless-802-11-Adapter/dp/B004I8B8Z6/ref=sr_1_4?ie=UTF8&qid=1333957173&sr=8-4 http://www.amazon.com/SANOXY-USB2-0-Wireless-802-11-Adapter/... If you want the whole computer instead of just wifi, try this: http://www.volumerates.com/product/tp-link-tl-wr703n-openwrt-compatible-pocket-11n-150m-3g-mobile-wireless-broadband-router--blue-ship-with-openwrt-pre-installed-upon-customers-request-103048 http://www.volumerates.com/product/tp-link-tl-wr703n-openwrt... OpenWRT preinstalled for your convenience.