I've been working on variations of this for just over a year now slowly in my spare time. Although the project is labelled complete, there are still lots of improvements and upgrades to carry out to make the Razbot more capable and reliable.

The 2nd generation of the printed circuit board has been designed and is currently being assembled and tested. This is the version is found in the documentation. It has a few corrections and a few more features than the initial 4 working prototypes.

Now that there is a reliable working hardware platform, we can begin adding features to both the hardware and software. A list of 'to-do' items is found at the end of the Build a Raspberry Robot.pdf document. Some examples include:

Mecanum wheels for omni-directional driving.

A web interface using ROSlibjs

Publishing the instructions and files to use the GAZEBO physics simulator and a virtual Razbot