I'll hit first since I'm probably the newest fish in the jig pond.
It is a good idea, but I see two (fairly major) problems:
1) When jigs are "custom made", the options are unlimited. So the picture base you will end up with would be absolutely huge. If you were to get a collection of manufacturers together, people would get lost looking at everything.
2) You set different people's work side by side - someone's is going to stand out, and that can cause problems. I was on the positive side of that once, and felt terrible because of it. I want no part of putting someone else's craft down.
I believe each one of us has a specialty to share, and coming together in one spot should be a situational thing, not a standing "flea market" if you will.
There is a common respect that I see on this board, one that had me worried when I first ask Ed for permission to put my stuff up. Each one of the "major" makers could go picture to picture with each other over who has the "better" jig - but they don't. Each one will post pictures to use as examples for a discussion, call it a plug if you will, but not to undermine. I fully anticipated getting resistance for being here, but just the opposite has happened. That says something for the members of the board as well as the previous jig makers here.
Maybe I'm not making sense with this.(?) I like the idea, I think it would be a good one time thing - but not a constant link. Each company has -or- will have their own site, and can get someone to it if they are looking for something particular.
Me........I'll take word of mouth right now, with a few pics here and again of new work.