The Make blog had a link to an article at memepunks also denouncing the inability to procure required compunds for amateur chemists and model rocket enthusiasts. Addressing the regulations put in place to prevent bomb-making, home-made fireworks, meth labs, they also note a few other places that are still trying to facilitate at-home chemistry experimentation.
http://www.nitrogenorder.org/lessons/household.shtml--how to find the chemicals you might need for experiments
http://www.hyperdeath.co.uk/chemicals/--build your own chemistry set and find experiments
http://www.sas.org/labrats/index.html--an interesting science mentoring program by the Society for Amateur Scientists