Topic: So, I got a new pedal too...
My wife got me a Radial ABY pedal for Christmas. Detman, I never did get around to making the design you posted (fortunate for me!) . I had been playing electrics through the pedal board, and acoustics through the acoustic amp/ PA. Needless to say, this entailed a lot of plugging and unplugging and awkward stage antics. Now, I can play everything through the pedal board and play through both amps, or one or the other. Both together sound good in a lot of circumstances as well. This pedal is completely passive and includes enough switches to keep the hum out of your chain without coloring your sound at all. I run all my stuff through the same power source so I don't have a problem with this, but things could be different for other people. All in all, a great amp switcher and a great wife!