Here's an excellent guide for what is involved in becoming a non-profit organization in California (where TeamHuman.org HQ is based):

http://www.cafcc.org/cnonprofit.html

It's probably too early to deal with this yet (board meetings would be quite dull with just one person there ;). But it's useful to see what all's involved, once we have more critical mass.

Wikipedia page: http://en.wikipedia.org/wiki/501(c)

Key question: Does it make more sense to be a 501(c)(3) or a (4) or a (6)? Being a (3) would attract more donations, but the other options would permit involvement in other areas (political lobbying, which might be of interest).