Adobe recently released a new product in Labs called Adobe Wave, which is basically a service tied to an AIR application to send updates directly to the desktop of end users. It serves the same function as a desktop based RSS reader, but is proprietary, does not read regular RSS feeds, and has no web based access for users to check the latest updates. The service will probably not have any wide spread due to the effort necessary for publishers to set up their feeds and integrate the Wave API into existing feeds.

Anyway, Flash developers should still check it out because it is a great example of a light-weight AIR application that has a nice simple interface and great web connectivity.

You can learn more about Adobe Wave at Adobe Labs.