I am not 100% sure what you are referring to. Depending on camera mode, you can define the camera direction, or the position of the camera relative to a target, via azimuth and polar angle. If you are referring to additionally rotating the camera around its longitudinal axis, that isn't possible.
Effectively, the beta hasn't changed any of the underlying capabilities of the camera, but access to these capabilities from the API. So I would tentatively answer no to your question.
Understood, would it be possible to add longitudinal/roll to interior and exterior cameras at some point in the future? I'm thinking specifically about being able to have a "docking camera" who's alignment vectors would match the docking port's.
IE SetCameraParams (pos, dir, rot);
Another issue, did you make any changes to how animations are handled, specifically MGROUP_ROTATE? Something in one of the updates since 0.47 seems to have broken the engine gimbal animation on my Lunar Module. The code on my end hasn't changed and it still seems to work in Orbiter 2010.
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PS: Sorry If I seem like I'm nit-picking. Please keep up the good work. I've been having a blast with the new beta.