I found this diagram informative (although not comprehensive, and probably a bit politicised): http://reason.com/assets/db/07cf533ddb1d06350cf1ddb5942ef5ad.jpg

I found this diagram informative (although not comprehensive, and probably a bit politicised): http://reason.com/assets/db/07cf533ddb1d06350cf1ddb5942ef5ad.jpg http://reason.com/assets/db/07cf533ddb1d06350cf1ddb5942ef5ad... (via http://reason.com/blog/2008/09/24/new-at-reason-mike-flynn-shikh http://reason.com/blog/2008/09/24/new-at-reason-mike-flynn-s... )