I am eagerly awaiting my Mac Pro with Aperture preinstalled. I have fiddled around with Aperture a bit via the free month long trial, but I can't say that I have any real idea how to use it. I have essentially no PhotoShop experience either. What's the best way to "learn" Aperture? I know there are a few online posts which I have been reviewing, but I would really like to find a good how-to book. Any suggestions?