At the moment, there is no fixed release schedule but as things start off, development will be moving quickly, so you can expect very frequent updates. If you download, please sign up for at least the announce@DesignTools.org mailing list. List details can be found HERE. The announce mailing list is low traffic but is the only way to let you know about new releases and if need be, critical bug fixes.
The initial releases will be quite small, only a few utilities for the Cadence PCB Editor and the Cadence SKILL libraries they use. The most significant program in the initial releases will undoubtedly be "The Destubifier." This one program is alone worth your time to download and install the project code.