Public access to the beta (and pre-orders) are estimated for the 29'th of August.
Pricing related questions are among the most frequent so here are the answers:
FaceRig Classic: ~ $15 USD (and a bit more in Euro region due to VAT). It will be 33% off during Pre-orders, so who joins in early will pay just ~$10 USD.
FaceRig Pro: total cost (FaceRig Classic + Pro upgrade) ~ $80 USD . Same as above regarding VAT and 33% off the total cost during pre-orders.
This does not add anything extra in regard to content or functionality, it is the same program with the same content and you can make (and sell if you want) custom avatars for both, except with the Pro you as the user gain the right to monetize the generated videos online (details will be present in the EULA).
To re-iterate: The Classic version and Pro version are identical both from a technical standpoint and a content standpoint (the same avatars, props, backgrounds, ability to import custom avatars and everything else); the ONLY difference between Classic and Pro is that you can monetize the created audio video content if you have the Pro version, while Classic is just for having fun (non-profit use).
Access to the Beta will not be free, but it will be open for anyone who pre-orders (and for the crowd-funding backers of course).