The TP-Link WR703N (machine translation) is a small Wi-Fi router that’s easy to hack, and flash with openWRT. The best feature about it is that it cost only $20 on eBay. It features a single host USB connector making it easy to connect USB devices to it. The processor runs at 400Mhz, with 4MB of flash memory, and 32MB of RAM.
Via the forum.