In Kolb and Turner's Early Universe, (see here) it is mentioned that
Variation in the CMBR temperature in different directions is expected due to several effects: the motion of our local reference frame with respect to the cosmic rest frame (i.e., the FRW frame), rotation of the Universe, ...
1. As far as I know, the FRW frame is a coordinate "grid" attached to the expanding universe itself. In this coordinate system, the galaxies drifting along with the systematic expansion, sit at fixed coordinates at all times. What is meant by a local reference frame as opposed to the FRW frame? In this context, does it refer to the satellites that are up in the sky for measuring CMBR anisotropy?
2. Is there a conclusive evidence that the Universe rotates? Is there a preferred axis then?