Offer cash prizes for useful insights, or feature useful insights on the Singularity Institute blog. Respond to the work of amateurs, as a way of recognizing its legitimacy. Improve recommended reading lists for understanding/contributing to FAI related topics and increase their visibility. Sponsor a "FAI programmer wannabe" mailing list/reading group.

I like your later suggestions much more than your first. We already have a supply of interested people - enabling people will probably have much more bang/buck than rewarding people. (And of course for those who haven't seen that video)