which players have a great "Inside-Out" forehand?
This is a shot used very often in mens tennis (see Roger and Rafa) but not as much in WTA.
I would say Dementieva and Kuznetsova are the best at this shot, Henin also use it as one of her big weapons. And of course Ivanovic. And coming from the left side, Schnyder can be extra tricky using the inside out.
On the other hand, Sharapova and Williams sisters (esp Venus) are not very good on inside-out forehand. Neither Chakvetadze, Jankovic, or Mauresmo.