There is a good write up today on the Fahnestock Winter Park (alternate link on NY outdoors blog), including some expansion plans.  I love the idea of making a groomed trail around Stillwater Pond, as that would give another couple of miles on the wooded side of the park, which is my favorite.

Fahnestock Winter Park is currently fully open, including the Lake Trail, and definitely something you should check out if you like x-country skiing.  I was just there yesterday, and the snow is quite good.