Today we released a Jing update that works on Windows 8 preview builds. You can check for updates within Jing if you haven't been notified that an update is available.
We are working on updating all of our products to work on Windows 8, they all have different challenges and time lines. We will provide more updates here as soon as we have any new information or releases.
Thank you for your patience. Please continue to send your feedback and questions.