When I was in there earlier this fall, Jason said that they are not doing the 'extreme' stuff, including anything with scalpels or dermal punches. I would expect this to extend to deep oral piercings. Apparently, the owner of the studio lets the staff do pretty much whatever they please, but they're not interested in the 'cutting edge' as much as the 'traditional.'
I know Perfortations does at least *some* scarification, but I don't know much more about that. You can contact them through the addresses found on their website, at
http://www.perforations-dc.com