Thats the basic kit i used in my build, but you dont want to use that power supply, you will need a decent linear one. You can buy that kit without the power supply parts here http://www.circuitsathome.com/products-page/usb-interfaces but to be honest you would be better off waiting for Tomb to finish his isolator/power supply kit and buy that instead.
The Doodlebug looks very interesting. What would be the advantage of the Doodlebug over the isolator I mentioned with a linear power supply?
Also I have never built anything on a pcb board. My only soldering experiance is repairing/building cables. Is an isolator difficult to build? One of the main reasons I was interested in the circuitsathome.com board was that it was pre built.