Backwards compatibility

Is version 3.0 backwards compatibility with 2.0 (or at least similar enough I can go in and update my 2.0 code to work correctly in 3.0  ?)

If not, should I wait until 3.0 becomes the main project?

Also is 3.0 stable enough to be used in a small scale game ?

AFAIK, jme 3.0 is not backward compatible to 2.0.

Momoko_Fan said Ardor3D may be more compatible to jme 2.0.