Just found some interesting You Tube videos on portrait retouch. Here's a good one:
www.youtube.com/watch?v=eQWt3Kx4DGY
others:
http://www.youtube.com/watch?v=aHLpRxAmCrw
http://www.youtube.com/watch?v=5iwaQ2zi63c
http://www.youtube.com/watch?v=BlV7I8Qm7Vw
http://www.youtube.com/watch?v=C1wX0b3X3RQ