There's also "Phone-omenon" by Doug McKenzie, with which you can "cause any prediction to appear on a stranger's cell phone." I believe that David Blaine performed it on one of his many TV specials.
Here a description of an effect -- "A random stranger in the crowd is focused on remembering a card when suddenly her cell phone rings. She takes her phone out of her pocket to check who is calling only to see the name of her card staring her in the face."
I don't have it, and therefore cannot recommend it, but it sounds dynamic.