Inner Thigh Toning

Pilae (sp?) squats are great. If you have a chance, go on youtube and search for blogilates. Cassey has two videos dedicated to inner thighs. They are tough but will really tone those muscles. She has a squat workout video too. They're short but amazing.

http://www.youtube.com/watch?v=-Icu6oXYL00

I remember this being a killer.

Also ballet/plie squats as thathockeychi suggested.
Then the horse riding stance if you want you can keep some little weights in your hands. It is a great core/innerthigt exercise.
http://www.shaolin.org/general-2/horse-stance.html