I have updated the Semi-Automatic Classification Plugin for QGIS 2 to version 2.1.1.
This is the very brief changelog:
-update to the new Processing framework (SEXTANTE)
The SEXTANTE framework in QGIS 2 has been renamed to Processing. Consequently, all the references to SEXTANTE in my plugin had to be changed.
The updated Semi-Automatic Classification Plugin is already available through the QGIS repository, or downloaded here.