The first unibody 17" Macs with built in batteries came out about a year and ten months ago. Apple promised us the battery life would not start to degrade for at least three years, and that we would get 1000 charge cycles out of them. For those who bought those machines when they came out, how is your battery doing? Have you noticed reduced performance? I so love the battery performance of my new 15" Unibody MBP but hope it'll be nearly as good a few years down the line!