Since the list(s) are pretty quiet right now.....
Maybe not entirely synth related, but I know there are a lot of guitar
effects fans out there. If you're one of them, you might want to check out R.
G. Keen's geofex site (are you still on the synth diy list?) for his rather
novel concept of modularizing guitar effects.
http://www.geofex.com(great site in general for effects)
Click on the FXBus link.
I seem to recall Sequential Circuits having a modular effects package with
something like a P5 memory in the early 80's -- I never saw one of these,
maybe they never shipped, I seem to remember the "suggested list price" being
quite high. The geofex module concept is at a bit lower level -- more like a
modular synth in that regard. Very interesting idea.
JB