I recently upgraded my Marmoset Toolbag from 109 to 110 and found out it now includes stereoscopic display for Oculus Rift for anybody that has it. Just thought you might be interested. If I posted this in the wrong place, my apologies.
Cheers
Yep. Marmoset is on the ball, they also have skybox for Unity. Apparently the next big update will change a lot as well, though it will cost $ for the said upgrade. On the Rift front, they were given a $16 million dollar investment just recently and also showed off their first prototype of the HD display.
Its release is just getting closer and closer. =)