The PI fireworks have been shortened even more considerably since early 2002. The running joke at the Adventurers Club is that you can go outside and see the fireworks, which consist of a monkey with a sparkler.
Seriously, it's a VERY short (less than 3 minutes) show, with the fireworks now being blown from the roof of the Adventurers Club. They DO do longer sessions for holidays (July 4th, a day or two of Black History Month, Cinco de Mayo, etc.), but they're few and far between.
-Sharon-