Great thread! I've been thinking of doing something like this and you may have pushed me over the edge.
Out of curiosity why did you chose to use an external sound recorder over something like the SEMA-1?
The SEMA-1 is about $100 cheaper, and you won't run into sync issues with sound. It even comes with a small stereo mic.
It should also be noted that you can buy an EPL2 brand new for $400 if you keep an eye out, used I have seen them as low as $200.
Finally, this really applies more to me but I thought I would make it known to all.
If you are planning on buying a lens adapter to use older MF glass then think about options before you buy. I currently have lenses in the following mounts that I would like to use:
Pentax Screwmount (M42)
Leica Screwmount (M39)
Now I could buy 4 separate adapters, but that would be costly and take up more space. Or I could do the following:
Leica M to Micro 4/3ds adapter
Leica Screwmount to Leica M adapter
Canon FD to Leica M adapter
Pentax Screwmount to Canon FD adapter
Now you may be saying "well you still need 4 adapters anyway" and that is true. But the difference is that the bottom 3 I have listed are typically $10 instead of $20 for the M43 adapter, they are also much thinner. Taking up way less space. I now also have a system that I can build off of. Just leaving the M43 adapter affixed to the camera. And then choosing one of the three adapters from that point on.
If any of that made sense