Here’s a modified version of the GF1 firmware that allows for full 1080p HD video recording. To update your camera’s firmware, download the file, copy it to the root directory of your SDHC card (after having formatted the card), turn on the camera with the card inserted, and press the play button.
Sam O’Hare spent a week making a neat video of New York City. He shot the entire thing with consumer-grade lenses on a Nikon D3 in burst mode. He added stabilization and the tilt-shift effect in post-processing. You can find more details about the production of the video here.