Part of my decision in not thinking Whistler would ever go anywhere, was the highway that joins it to Vancouver. This is one of the most spectacular drives in the world. It is also one of the most dangerous, although big improvements have been made over the years. The road is described in more detail below, as are your transportation options. Whistler, along with Vancouver, stands a better than even chance of snagging the 2010 Winter Olympics, especially since Toronto lost the 2008 Summer ones to Bejing.
Whistler is a year round resort.
Summer or winter, it is crowded with tourists. The town has posted several maps in public areas to assist you. You can ski in Whistler year round, albeit in the summer there is only glacier skiing. The town offers many other summer activities. Mountain bikes are easily rented in the town.