I put up a link on a "can a laser printer make a fuel tank" thread a week or so ago, and here's another to the same manufacturer:
http://www.solidconcepts.com/news-re...olid-concepts/
Allowing for enthusiasm and hype, it's still an amazing outcome. If these guys are this far along and willing to talk about it, there are likely others in the industry as well pursuing similar outcomes in a like fashion or down some other path. Given the potential markets worldwide there's got to be a lot of innovation/testing/development going on out there. As for the bearing question the likely answer will soon be "yes it's possible, but will it be practical?". If some other application that pays is developed that is close or similar enough it just might evolve to fruition.