I believe the echorec is mostly based around a DSP core, so a trace wouldn't be terribly useful (though I imagine some folks would enjoy the pre-amp for the mojo).
As for where to post tracing threads, I imagine freestompboxes "circuit analysis" section is likely the best place to find clever minds congregating. Though the forum's vibe is occasionally a bit rougher than the laid back feel of MBP, its got a larger pool of eyes to show to.
edit: ok, so I was thinking of the belle epoch when I was thinking of the pre-amp. No idea about what the Echorec is running under the hood.