I just bought CRUMB and find it very nice. I am a Maker and also work in that field, so I of course had to. This is Fritzing on steroids :)
I did read through the forum and will hopefully not repeat already answered things.
* Will there be a possibility to generate a schematic from the breadboard?
* switching between Interact, Select and Scope should get a hotkey, or three?
* In designs with an arduino we need always press the reset on the arduino to get all running?
* if you ever decide to make it more game-like don't forget us Makers and educators an give us a great sandbox inside the game...
Maybe I add more later :)
Keep it up! Its great.