I wanted to let you know that Adobe is working on a brand new 'Adobe Exchange'. It's been written from the ground up and delivers a completely new user and producer experience that overcomes a lot of the issues we heard from existing users and producers of the current Adobe Exchange. We also just released a new tool called the Adobe Exchange Packager which makes it easy to package up your content for the new Exchange. We plan to have a release on Labs in July but if you sign up now you may have time to get your products on the new Exchange ready for the public release.
You can learn about the new Exchange and some of the tools for creating the content and products for it on this Adobe blog: