OK, apparently this times out, so here is how to get to the info:
Go to
http://homeport.uscg.mil/newyork
scroll down and click on the link at the bottom labeled "02. Marine Events and Fireworks Displays", under "Waterways Management"
This will take you to another page, and on the right side is a "Supporting Documents" area. In there is a link to the "Marine Event Calendar", where all the events are shown. For instance, in the next few weeks, there will be fireworks all over the place.
15-Jun-10 20:30 21:35 Fireworks Fort Tryon Park 75th Anniversary Hudson River, Fort Tryon Park 1 Tug & Barge 1 tug & barge Permitted
18-Jun-10 21:00 21:20 Fireworks Shackman Associates Fireworks Hyatt Hotel Pier, Hudson River, Jersey City Shore Shoot shore launch Permitted
18-Jun-10 21:30 21:50 Fireworks On the Hudson Liberty National Golf Course Upper NY Bay (Bayonne) Tug, Barge and 1 event support vsl 3 vsls Permitted
18-Jun-10 21:30 22:30 Fireworks Brooklyn Chamber of Commerce/Coney Island Display Coney Island 20 min display, shore launch from Coney Island Beach, 5" shells 1 vsl Permitted
18-Jun-10 21:30 21:45 Fireworks Liberty National Golf Course Liberty State Park 1 tug and 1 barge 1 tug & barge Permitted
24-Jun-10 21:00 22:15 Fireworks Battery Gardens Fireworks The Battery Hudson River Park Safety Zone 10 min display from a barge, 8" shells, CFR Site 1 barge In Process
25-Jun-10 21:30 22:30 Fireworks Brooklyn Chamber of Commerce/Coney Island Display Coney Island 20 min display, shore launch from Coney Island Beach, 5" shells 1 In Process
25-Jun-10 21:30 22:15 Fireworks Coney Island Fireworks Lower NY Bay, Coney Island Beach Shore shoot shore launch In Process
and the list goes on