CowJam:
That's a great idea!
My first thought was that most of the mess on a breadboard is after the arduino-breadboard connection. For example:
There's only eight or so connections to the arduino and they're fairly neat, but then I realised that I've got a few breadboards all set up but missing an arduino, and I'll have to hope I put the pinout in the code. Having a set of your board would make it a whole load easier.
CowJam,
This is one scenario this wire management system is designed for, moving arduino freely between projects. If you're willing to snap a few shots of your various boards missing arduino before (got one pic already) and after using my boards, and use a couple sentences to describe your projects, I'd be happy to send you my boards to help you control the situation. I think I might have sent stuff to you in the past so I'll look for your address in my PM 