It it available thought I don't know of any dealers that have it yet. My store has a bunch of the Sahara tan coming in the end of this month. Contact me if you want to know more. Also in the Chicago area, North Shore.
I sent an email to Jeep about a week ago asking some questions about the Jeep.com web site being updated and they sent me a response along with a long blurb about the 2011 Wrangler. They mentioned white and blue being "late availability" but that's it.