If you missed watching the July 4th events and fireworks held at Oval personally, the 2008 Boston Pops Fireworks Spectacular will be broadcasted locally on WBZ-TV at 8:00 PM and for national airing, it will be at 10:00PM via CBS Network.
The show is approximately two and a half hours, with a two hour concert and a half hour firework display.
Here are some images of the Boston Pops Fireworks!!!Source: July4th.org