The 311 system has been in place in New York City since last March. I'm very curious as to the success/failure of the system, but the most recent report I've been able to find was from October. In that report, they estimate they'll log 5.5 million calls in the first year, and about 20,000 a day as of October.

They say the largest spikes during the black-out and after the Staten Island Ferry crash. This would suggest that the city doesn't do an adequate job sharing information with its citizens. I'd be interested to find out how many calls were the city "pushing" information to citizens rather than the intended purpose of the system to allow citizens to "pull" information from the city.