The biggest benefit, in my opinion is that people who are woodworkers that post electrical questions here are doing so among similar minded folks. I've been to Mike Holt's forum and honsetly got kind of confused as to where I'd post my woodworking-tool-related question on there. Here, I'd know where to post. And I could pretty well bet that someone else has tackled it before as well, from a woodworker's perspective.
I also see your point about the turners. Turning is kind of a whole separate faction of the woodworking subject as a whole. Well electrical is a pretty small faction in that light and I'd agree with you that a separate forum devoted only to woodworking electrical questions would probably not hold much value.
How about this instead... Shop Setup and Outfitting
In it, you find Dust collection, electrical, tool placement advice ... all those things that are part of the evolution of a shop. It's not much different, then, than a shop tours forum - it isn't quite as restricted as an electrical-only, but it solves one of the biggest problems with electrical questions - they get burried in the GWW forum because it's so dang active. A general Shop Setup forum would be fairly busy, but not so busy that a question asked this morning is 3 pages deep by this evening like can happen in GWW.
Just a thought ...
Jason Beam
Sacramento, CA
beamerweb.com