I don't think any of the big manufacturers are using them, although they may be using them in some of the moderately expensive bicycle headlamps (for those that can't afford $350++ for an HID).
I think that there are a couple of people here on CPF besides myself that are working on making a portable light using these bulbs. They are nice, but heat is a MAJOR problem. You could cook a steak on them after a few minutes.
I've heard vague rumors about a neodymium doped flashlight bulb under development somewhere, but nothing firm. The only ones that I know of for sure are the Solux MR16 based units, and some really expensive "medical" and photographic types of bulbs.