C.L. Ertl & H.W.T. Triggs, We Are What We Know, 2001.

The best way to implement a system is to allow it to evolve, to empower the participants to use it in the way that they want to, and to encourage opinion leaders to be the early adopters. That way the network is likely to be the place "where it all happens". This will be the only incentive needed to get others to participate and to achieve critical mass.