The blogpost contains some details on how SSHD was optimized for 3D, but if you want those follow the link!
http://blog.eu.playstation.com/2010/06/10/super-stardust-hd-3d-story/
3D certainly has a bright future ahead and we are happy that we had a chance to develop the first 3D PS3game that runs 720p resolution in 60fps for both eyes, meaning that we are actually having 3D SSHD running in 120fps! The improvements we did for our engine are also benefiting the gamers of 2D version as well. To summarize, the 3D version includes:
- 3D mode of the game running 720p at 120fps (60fps per eye)
- 2D mode of split screen co-op mode updated from 30fps to 60fps
- 4x antialiasing support in 720p and native 1920×1080p support in 2D mode
The 3D update is free to all existing SSHD gamers enhancing also the 2D mode, so don’t forget to update your game even though you haven’t got your 3D television (yet)!
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Those are some sweet upgrades! 
