We have are in the northern Berkshires and there is definitely something going on. The leaves, while technically green, are beginning their change into the yellows and golds of autumn. These are mostly maples right now since birches tend to be just a step behind. Swamp maples (the red ones) are the first ones jumping up and down to get attention.
Anyway, to track the conditions I use a few web sites covering Maine, NH and VT. They have just begun posting updates so peak will come along pretty soon.
hope these help out. I'm going to hike the Moat Ridge next Saturday so if there are any APUGers who'd like to join me, let me know and we can arrange times, etc.