What we should have is a list of small merchants that pledge to start accept Bitcoin IFF some big merchant starts accepting them. Ideally they should be complementary, the small merchants being the supplier of the big one.
So it would look like
Businesses that pledge to accept Bitcoin IFF business X starts accepting them.
Business A
Business B
etc.
So you would have Amazon.com for instance, that would know hundreds of businesses would start accepting Bitcoin the moment they do.
http://www.causes.com/actions/1744873-bitcoin-adoption-merchant-pledge 
