Hi Chris
 > I noticed on your website that you are working on a new VCA and VCF board that
 > would make the Mono/Poly a real polyphonic synth. Have you made any progress with
 > this modification, or is it currently on hold
Yep. It is on hold. And I am not sure, whether I will continue.
 I stopped it in November 2009, as I got a broken Polysix, which I tried
 to resurrect. I wanted to add individual switches for the VCO to the
 Polysix like in the MonoPoly. This way I would have had the same
 arpeggiator tricks with different VCO settings as with the MonoPoly. But
 then again, I had to sell the Polysix again, because I definitely ran
 out of "storage credit" by my girlfriend ;-) (I bought some other gear
 too the last years...).
 Now the MonoPoly project has returned to my attention again, but I have
 only a little time for it. I have redesigned the pcbs for the quad
 envelopes (based on SSM2051's from a broken Poly61) in July, but no
 other progress happened since then until now (October).
 As said I am not sure, whether I will finish this project, as planned.
 Maybe I will change the quad Envelope to a 3HE compatibel module. I
 bought also a prototype of the Doepfer Quad FilterVcaPanner
http://www.doepfer.de/a1352.htm
 /
http://www.doepfer.de/A1352.gif.
 So
 these two might be a good extension for the monopoly too.
 Florain