This sounds like an awesome idea. The only problem I'd find in this is there needs to be somebody who is fluent or really good at Japanese to nit-pick more errors.
New people would need somebody who knows more to help.
You guys should join:
The Japanese Page | TheJapanesePage.com
It's been greatly improved than what it was on the old server and you can post blogs there. I think it'd be a lot easier to become a member on a larger website with more knowledgable people to answer questions.
My account name is "Hatori" if you're interested, and it's a really great community.