I've moved the MaxSonar EZ1 onto a panning servo, and attached it to the outside of the electronics enclosure.
I've also added a "BlinkM" intelligent LED to give PenguinBot some personality. I haven't written the code for it yet, so it's currently just scanning through it's default pattern... but there's always tonight....I've added Serial Control to drive it tethered via USB, my expectation is that I will get a BlueTooth-FTDI adapter...
I've broken the Arduino code out into separate tabs according to their role, ie: motion control, serial interface, sound...
This project is growing legs.....
References:
BlinkM datasheet