Revisions for 2011 include:
* Rear View Monitor added to Navigation Package (370Z Touring)
* One new exterior color: Gun Metallic
Source:
Details on 2011 Nissan GT-R, 370Z | Automotive.com Blog & Enthusiast Discussions
Not sure how reliable the source is, but seems legit. I wouldn't imagine they would change too much seeing as the 370 is only going on it's third year.