The DS Lite section on Nintendo's Japanese website has today been updated with a new "color variation" titled simply "Noble Pink".
Nintendo have been having problems keeping up with DS demand in recent months, even though they have increased they're production rate to over 2 million units per month. We expect Reggie put in a special request with Iwata for a pink version of the DS Lite.
The ultra sassy Pink DS Lite is set for release on the 20th of July in Japan. There is no confirmation on a European or North American release of this color as yet, so if you really really want one you'll probably have to import it.