Switching modes on the r00tabaga is simple! Just type activate! The syntax is simple:
activate [minipwner | pineapple]
reverts the device to its default pen-test drop box state, and
switches the device to wifi man-in-the-middle mode with a full WiFi Pineapple web interface.
In each case, you'll be prompted to reboot, though you can always skip rebooting and just restart services manually if you prefer.