I understand that Fusion Accelerator is a fork of Skinr

Many themes for drupal7 still refer to Skinr, e.g. http://drupal.org/project/mix_and_match

but Skinr doesn't appear to be confirmed stable for drupal7

Some themes even warn about Skinr on drupal7 being unstable

Do all of these themes automatically work with Fusion Accelerator?

Or do they need to be adapted one by one?

Or is Skinr eventually going to be OK with drupal7?

and if Skinr is updated, will it be incompatible with themes based on the latest Fusion?