Yes, I have used the rocket ignitor/flash paper combo in certain magic tricks - just push the secret button and WHOOSH!
Bill Hagg uses different special effects with chalk, including fire. Essentially, he uses a low-tech approach where he fastens a few cheap soldering irons up behind his light hood and runs the cords behind the drawing to an outlet/switch arrangement.
Then he wraps balls of flash paper around the soldering irons and when he need to simulate fire falling from heaven (Elijah, Sodom, etc.), he activates the switch. The only problem with this approach is that you can't predict exactly when the flash point will be hit. I think he said it takes about a minute for the fire balls to start dropping.
Caution is advised - some venues have strict "no pyro" rules in place.
Best, Kerry