great shots, but seriously mate, you need to clean your sensor, its really dusty. Get either a camera place to do it or read up about it first. Dont just use a tissue.
Here's two shots from the chinook I talked about. 1ss one was blurry and for 2nd one, I had to run to the front door and it was already nearly over the trees.
Intel Core2 Quad @2.40GHz, Vista Ultimate, NVIDIA 8500GT, 500GB internal HDD and 250GB external.