The Omni Group has posted a demonstration video of their upcoming GTD (Getting Things Done) product OmniFocus. For those who are not familiar with the GTD methodology, it is based on a productivity book by David Allen called Getting Things Done: The Art of Stress-Free Productivity, and popularized by Merlin Mann over at 43 Folders. The basic goal is to get everything out of your head and into some trusted task management system so that you can stop stressing about it.
There are a bunch of systems out there based on this methodology, but this one looks like the right balance of organization, and not too much overhead. Hopefully it lives up to the promise and hype.