OK, so I did a Google search for ski specific exercise programs, and found one that I really like. It's called FitSkiing by Andrew Hooge.
What I really like about it is that not only does it give you a specific program to follow for a 12-week period (just in time for the season!) but also has over 70 ski specific exercises.
I just got the book and have been following the plan for just a few days, and I like what I see so far.
Check it out...