If you are interested in building a skatepark in your own community, we highly recommend that you start with the new Public Skatepark Development Guide, published by the IASC, Skaters for Public Skateparks and the Tony Hawk Foundation. If only this had been available when we were getting organized!
No need for us to compile Colorado skateboarding links, when Jimmy Snyder's site has them all: Colorado Skateboard Guide
The firms behind some of the best skateparks being built in the US:
Links to some Nederland-area non-profit organizations: