Disneyland is now using compressed air to launch pyrotechnics. I read about this before my trip, but it slipped my mind while I was watching the display last weekend. Nevertheless, I did manage to snag a quick Quicktime of the show from my location inside the California Adventure park.
Disney is donating the seven patented technologies they developed to a non-profit which is supposed to license this technology more widely through the pyrotechnic industry.
You can view the Quicktime here.