Article in 6/9/2011 Independent, (Livermore/Pleasanton), cyclist goes down in urban park, Sycamore Grove Park, passer-bys dial 911 and call gets routed through Vallejo CHP control center, emergency services doesn't know where the park is, CHP spends 45 minutes trying to figure out how to get help to cyclist including calling Livermore police and FD for assistance. Passer-by firefighter gives CPR in the meantime. Sad story, biker dies regardless.
I guess the moral of the story is don't assume 911 is going to be much help unless someone can call out an exact street location/intersection. Articles says better to dial local number for the area or park police or FD - services that know the area you're in.
Outsourced - centralized 911, another really great idea. Why not move it to India and give them Google Maps to work with...