"Get one thing people really want (something like wikileaks maybe?), make it available free on IPv6 only"
That reminds me of one IPv6 fan giving a talk, trying to motivate the audience by saying that there is some *uncensored usenet server* in Europe, only via ipv6. The embarrassing implications induced a few groans.
"We need more carrots,"
Why? If the IPv4 sky is really falling, a collapse-in-progress should motivate all those whose livelihoods depend on it.