A helpful area where people can ask questions would be great.

Much like Bitcoin there is a learning curve with 3D printing:

• What is the difference between filament types?
• What all software does one need?
• How do I keep my print from shifting on the bed?
• Should it really take 8 hours to print something?

Stacker News has been a great repository of helpful post and Q&As for Bitcoin. Stacker News could also be this for 3D printing.