The new ProDAD Mercalli 2.0 Stabilizer is even better als the older version.
The plugin works fine with my CS5. The new version includes rolling-shutter correction to compensate for footage shot with CMOS-based camcorders, and uses 3D technology to track movement more carefully to get better results and to reduce the zooming that is inherent with video stabilization.
Mercalli is working very well and easy to use. I think Mercalli will be used more often than AE or Mocha stabilation.