For whatever reason, the most detailed information on the new features of the 2012 Camry Hybrid seem to originate in Australia. I know not all detailed interior trim details are the same as the North American vehicle, but I assume the power train is the same. Here is a good detailed summary that seems to originate with Toyota in Australia. I found it when searching for information on the "compound planetary gear system". North American reviewers and Toyota itself seem to be very silent on the fact that the Camry e-CVT is different than the Prius.
2012 Toyota Camry Hybrid Press Kit
Here are some things I picked out:
"Camry Hybrid's driveline has increased efficiency, including new low-friction bearings, improvements to the electric motor/generators and improved control of the electronic continuously variable transmission."
"Two important performance features are shared with the petrol Camry engine: a long-port intake manifold, which saves weight, reduces noise and boosts performance; and a long-branch manifold exhaust, which also boosts torque and hence performance. Friction-reduction measures include roller rockers and a variable-output oil pump. A cooled exhaust-gas recirculation system also reduces emissions."
"Camry Hybrid's new P314 transaxle includes two 650-volt AC motor/generators. One acts primarily as a generator and the other as an electric traction motor, delivering a maximum 105kW of power and 270Nm of torque. Improvements in the P314 transaxle include new control software, new low-friction bearings to boost driving performance and economy, and an improved flywheel damper to further reduce NVH."
(Goggle searches to get more detail on the P314 transaxle have got me nowhere...)
Currently I believe all North American Hybrids are made in Kentucky. Not sure if they have an engine assembly plant there too, or if that comes from Japan. There was some talk the new 2012 Hybrid would be so popular that the Kentucky plant would not be able to meet demand, and Toyota were seeking approval to import Japanese made ones. Don't think that happened.