2nd time posting a picture to the forums... But this was my first attempt at fireworks with all the tips gathered from this thread.
It was a small festival with only 3000 fireworks launched lasting only 90 min, and they were all launched form the same area as they all exploded in the exact same spot, so no way to layer the images. In the future i'd probably try shorter exposures as I was sitting at 4-8secs for the most part.
650D 10mm f/14 2 secs exposure.
Btw, if you love fireworks you really should come to Japan. There is a fireworks festival every weekend until Oct. in towns within an hours train ride from me.