This blurb was actually posted on the Polaris Wiki a few days ago and probably responsible for all the hysteria and rumors about what is coming out on all the forums. It's actually quite funny since all of it is apparently false. Enjoy and remember....THIS INFO IS NOT VALID.
from the wiki:
==New for 2011==
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The soon to be released 2011 model lineup is sure to shock the current ATV and UTV industry. When Polaris Industries introduced the Ranger RZR model in 2008, they changed the way side by side vehicles were perceived. No longer were they just considered farm implements or a job site work vehicle, they brought the "Sport" aspect to the market. Once again they are changing the market for 2011 with their new RZR lineup. Polaris is carrying over the names and models from the 2010 model year, but each model is getting a few substantial changes due to more competition from other manufacturers. The 2011 standard RZR will still be 50" trail compliant, but it will be getting upgrades in a few departments. There will be 3 motor choices for the 2011 RZR, an EFI 500cc twin cylinder will be offered with a base price of $6799. This new economy based RZR is for the owner who wants a sporty side by side but doesn't want the high price that comes along with one. The 800 H.O. engine will be the standard motor in the new RZR, which is carried over from the previous model year RZR-S. And an all new EFI 950 (941cc) twin cylinder power plant will be available in the spring of 2011 for the Limited Edition and Special edition RZR's (pricing is TBD). All of the 2011 RZR's feature an all new frame, which is 6" longer than the previous models to accommodate the new engine choices. Polaris engineers boast that the new frame is 60% stronger than the previous models. The 2011 Polaris RZR-S, and RZR-4 share the option of the 950 engine along with the SE and LE RZR's, along with the 800 H.O. engine from previous model years. The suspension travel is increased to 14" on both models due to a new trailing arm setup in the rear, and longer A arms in the front. All 2011 RZR models will have a ROPS certified roll cage made from 1 3/4" chromoly tubing, along with 4 point racing harness style restraints. A few cosmetic changes are evident on all new models which include new styled plastic fenders, a redesigned roll cage, and a more aggressive styled front end. The new Polaris 950 engine is going to be used in multiple platforms, from the Ranger RZR models to the new 3 wheel "Striker" road bike, which will be released in the summer of 2011. The 950 engine is rated at an impressive 97 horsepower and 76 ft-lbs of torque. What is deemed even more impressive is the amount of "pre-release" conjecture and speculation on RZR internet forums where there is always one guy who knows this guy who works for Polaris. The truth of the matter is that the 2011 Polaris RZR will be offered in a super secret special limited edition with a V-12 engine capable of producing horsepower and torque never before seen in a Supped Up Golfcart (SUG). This new, yet to be seen SUG class is guaranteed to generate an increase in sales and create a scrambling of mid life crisis men into taking a third mortgage on their homes and cashing in their children's college funds just so they can make their golfcart go faster than the next guys.