Just wanted to mention that I finished and confirmed the schematic for the Pigtronix Philosopher's Tone a little while ago over at FSB, and the results are in that link to the FSB thread posted earlier. Harald from Sabrotone made an awesome vero layout (with onboard pots no less!) - I built this vero and confirmed it working.
IMO the critical component on this circuit is the LDR/LED that controls the automatic gain adjustment. I tried a couple of different LDR's I had laying around with difference characteristics, and found they didn't provide a quick enough reponse for a sudden hot signal, or didn't give enough gain for quiet signals. The VTL5C6 as in the original pedal works fine though, so keep this in mind if you build it. I don't know what LDRs would be suitable as a substitute, you'd have to look at the spec sheet for the VTL5C6 and compare to the LDRs.
