Thanks to a tipster, we now know that Cisco is set to release a new Flip called the Slide HD. Based on the pics alone it appears to include a similar form factor as previous Flips, but when rotated to a landscape mode can be slid open. What lies beneath the screen is still unknown, but as you can see the display has grown drastically in size. Video resolution is still capped at 720p with a total of 16GB of memory for recording up to 4 hours of video.
Expect the official release any day now.