I was using the Raspberry Pi as my wifi router, but I have to admit I reached it’s limit quite soon. Even with a good wifi usb dongle, I couldn’t get a stable and fast connection.
I then bought on Amazon a TP-Link WR841/ND, a small and cheap router but quite strong and that can run OpenWRT. It provide 4 ethernet ports + one for the inbound internet connection + Wifi n 300Mbps. You can find the complete information about the model on the wiki of OpenWRT.
The first thing I have done is checking the version of the router, I have the v9 meaning I won’t be able to use the last stable version of OpenWRT (12.09) but only the bleeding edge (from r40695). I can confirm that the last build is working perfectly well (Chaos Calmer r42263). Because of the lack of space left after installing Luci (the administration panel), I wanted to create my own image to build into the squashfs the needed packages.