I want one! HummingBoard: Will fit in a Raspberry Pi enclosure, runs Linux or Android, packs a bigger punch. Caution: While the pins are similar to Raspberry Pi, installing Pi hardware takes extra effort (not a direct replacement).
Turn Your Old Router into a Range-Boosting Wi-Fi Repeater
If you're upgrading to a faster, stronger wireless router, don't chuck your older Wi-Fi box. With the magic of DD-WRT, you can turn your older wireless router into a range-expanding Wi-Fi repeater to cover everywhere you need a connection.