WHMCS Provisioning with Pro Sites

I read that the WHMCS Provisioning and Pro Sites plugins are being integrated. That is great news!

Are there any details about how the integration will work? And how close is that to being ready?

I really need that functionality on my site and I need to know if I can plan around it being finished in time.

I want to be able to provide a few different levels of membership, starting with free, and one or two levels of paid membership. I’d like to use the Pro Sites functionality to limit what plugins and other things are available to free users, and make more available to paid ones.

Ideally I’d only use Pro Sites but I need to be able to process payments through Clickbank and that is not available. Any idea if that’s in the works?