I'm sort of unexpectedly bulking up at this point in my life. I guess I should wait a while before spending too much on jackets- my shoulders, chest and arms are much bigger now than even just a year ago.
I've been hitting the weights (well, P90X) for almost exactly a year. While my body is significantly different than before, I've been surprised at how much my old shit actually still fits. It just fits better. Only real exception is casual shirts and denim. I've had to go up a size in casual shirts, and down a size in jeans. I count these facts as major wins.