WiFi Hotspot Web Authentication Solution
http://wenku.baidu.com/link?url=BvULY02IDvuH0fsURB8wa-rWEmiBaRi7-stK26uA51qez-Yytkuax7qLTdONEXQyWdmup5QzI6YW67maD35nPsqwBqVnKLGYGvqMwLS-k1S
Reborn, use DD-WRT to build your own router (how to brush into DD-WRT)
http://benyouhui.it168.com/thread-1720246-1-1.html
Wiwiz.com
http://www.wiwiz.com/zh/features/