Several months ago, Leticia James mentioned an interactive crime reporting map at an anti-crime rally. I finally figured out where it is -- the Society for Clinton Hill website! I've included it in the blogroll under "Important Contacts." It's currently on the SCH homepage, and can also be accessed at its permalink.
It looks pretty cool, and incidents can be categorized in different ways (violent crimes, theft, and even street/quality of life problems such as potholes). This map was set up for the purpose of accurate crime reporting and information sharing. Use it!