I wouldn't necessary call this a new way of using CHDK, but I recently used it to create a time-lapse photo of the launch of our space balloon last weekend.
I used CHDK on my Canon 60D to take a photo every 15 seconds of our launch setup and also had an on-board camera take photos every 14 seconds.
A quick note about the launch: The goal was to send a mini "Leg Lamp" from A Christmas Story up to 100,000 feet using a weather balloon. A mechanical failure caused the capsule to become separated from the balloon and the parachute. The capsule free fell from 60,000 feet without a parachute and survived! The video shows the details... Note that we recovered the camera with CHDK on it (thankfully).