A little back story. The interesting part behind my project is the use of an RT-N66U Asus router. This device serves as the microcontroller as well as the router between the internet via 4G and my RouterBot LAN which houses an on-board IP camera. The Router itself runs DD-WRT and my RouterBot application (written in C++). You can download toolchains to cross-compile code to run on DD-WRT (which was pretty fun!). All of the IO is done via USB including temperature sensors (USB to I2C), the Adafruit GPS (USB to serial), and the servo controller to drive the RC car (USB to serial).
You can see it on the show-and-tell here too.