We are in the process of packaging the plugin for deployment through the WordPress plugin repository. This means all WordPress users will be able to download the full plugin for free.
In the meantime, you can get access to the current version of the plugin (which is very much complete and deployed on several active websites) by signing up for our premium support membership here… just $10/month right now*.
More information coming soon.
* UPDATE: The PMPro Membership has been raised to $19/month.