Anyone else here try these? They seem to be fairly good, though some can be rather large, and I've only found DPDTs, but hey, you can make a true bypass with that too right?
I've never used NKK switches, but yes, you can do true bypass with a DPDT switch:
(http://yano.lardpirates.com/electronics/schematics/dpdt_truebypass.jpg)
If you want to use an LED with your circuit to show if its switched on or not, use a 3PDT switch or use something like the Millenium Bypass:
http://www.geofex.com/Article_Folders/Millenium/millen.htm
Hope this answers some questions.