While working on converting some extensions from 1.x to 2.x I documented my findings on a "Converting Tuscany 1.x Extensions" guide available in our 2.x wiki [1].
I Hope it turns out to be useful, please feel free to review and provide feedback. [1] http://cwiki.apache.org/confluence/display/TUSCANYxDOCx2x/Converting+Tuscany+1.x+Extensions -- Luciano Resende http://people.apache.org/~lresende http://lresende.blogspot.com/