I got this in the mail yesterday. It is pretty sweet. A tongue in cheek review done in the style of a real lens review can be found here. Thank you canonmugs.com.
I'd love to have this lens for my 40D, but it is pretty tough for me to justify the $2800. I like photography, but don't spend near as much time doing it as I should. I have done some Strobist type stuff that has turned out pretty well. Maybe I'll get to doing a little more of it now that I'm on holidays for two weeks. But the priority right now is on landscaping: the scope of my plans seems to be growing. Not sure if that is a good thing or bad.