I know they did them in '09. The Jeep site is here:
http://www.jeep.com/en/2009/wrangler_unlimited/What you may be running into (and this is what we ran into in '07) was that around the Sept. time frame manufacturers have ceased building for the current model year. We were ready to get our jeep in Aug of '07 but could not find a Sahara equipped the way we wanted (unlimited, manual w/ towing package). We had to wait until the beginning of Oct' of '07 to actually order the beast.
As far as I know, the auto pricing sites all have the 2010 Jeep Unlimited listed as an option. Right now if you are looking, you won't be able to build online until they start popping the '10 models off the assembly line - but you WOULD be able to build/price one at a dealership (if you can find one that isn't over zealous and pushy... we got lucky).