Man I though this was common knowledge?
Basically any BB turbo in their lineup can be oil-less (really, all they do is stuff their regular BB CHRA with grease) They are fully serviceable, but not sure of claimed longevity. I know a few people running them, none of which has locked up (yet)
Air Bearing turbos have been around even longer, but none I know specifically for Automotive suppliers.
http://www.nasa.gov/centers/glenn/about/fs14grc.html
People that make them
http://www.ofttech.com/
And fix them
http://www.airbearingsolutions.co.uk/about-us