It can be challenging to get people involved even if they have interest, skills, and time. Why is that? Our personalities can't be that objectionable, can they ;)? Sometimes the problem boils down to a lack of communication.
As one simple effort to find like-minded people locally, I posted a message like this to the craigslist "activities" page and similarly to the "strictly platonic" page:
Perhaps other folks would like to try similar postings in other locales (e.g. NYC, Atlanta). If this is going to be a "free math movement", it should be a popular movement!
In addition to this sort of shot-in-the-dark (pull) approach, one should presumably try some shot-in-the-light (push) approaches, e.g. canvassing local GNU/Linux user groups, or, like Ray is doing, LISP user groups, etc., insofar as they exist.
One difficulty is (of course) figuring out which are the relevant groups to canvass. --jcorneli