I believe this proposal is too narrow. You will run out of questions that can be asked after 6 months. Suggest merging this with a broader topic such as Cooking or Brewing.
It's definitely not too narrow, but the breadth might not be immediately obvious. I have no doubt that this site will gather the momentum it needs to get out of private beta, if it manages to sustain itself through commitment.
.. it just goes on from there. People invest thousands of dollars in making good coffee just at home alone, not counting the hundreds of thousands of dollars good coffee shops put into equipment. When I'm looking at putting $600 into a grinder alone, I'd like to know if it performs certain functions as advertised from someone that owns one, and that can be asked objectively.
Why not follow it, and see how much there really is to talk about :) Coffee is a very deep thing.
(Disclaimer: I'd rather survive on Ramen than go back to drinking bad coffee)