From the latest Maker Pro Newsletter:
Stack Exchange is giving Maker Pro Newsletter subscribers early access to the beta site, and a chance to help shape this resource for Maker Pros. If you do not have an account on StackExchange already, create one here. Then, use this private invite link to register for the Digital Fabrication beta. There's only a few days left in the private beta, so if you're interested in supporting this effort, log in now to ask your questions.
Thought some folks here might be interested!