Mini brought its birthday presents to itself out to the LA Auto Show for their North American debut today. The Cambden and Mayfair were there, but we spent a lot more time ogling the Coupe and Roadster. As you may recall, Mini created these two sports cars to celebrate its 50th anniversary and showed them off alongside the two special edition Coopers at the Frankfurt Motor Show. The changes are slightly less obvious on the open-top roadster, but you can definitely see that there’s no back seat and the windshield is laid back a claimed 16 degrees over the standard Cooper. The backwards baseball cap on the coupe is a bit odd looking in pics and the real world view doesn’t do much to change that impression.

None of the display vehicles sported any detail changes but it was still fun to see all of them packed into a booth the size of Toyota’s Venza section. Ian Robertson of BMW did share a few more details about the future of MINI, with the “R60″ 4-door-4-liter-4wd about to get a real name and even more models in the works. For now we have the Coopers and Clubmen and the coupe and roadster to keep us happy. Check out the gallery below.

Although Nissan and Infiniti won’t have an official presence at next week’s LA Auto Show, the luxury marque will unveil its 2011 M sedan at an event the night before the show and plans to webcast the proceedings at 7:00 pm PST on December 1.

Joining the thoroughly redesigned M on stage will be the updated 2010 Infiniti G and the oft-spied the 2011 Infiniti QX. Although official details haven’t been released for either model, a set of promo shots have already leaked out, showing a slightly reworked fascia equipped with a few organic creases, new foglamp surrounds and a tweaked grille. The QX receives a similar, although much more elaborate redesign, with a bulging hood, acres of chrome and a canted D-pillar.