This is a great site! I've been reading your reviews from the "outside" during the last several months while I was upgrading my lenses. Your comments helped me to finalize my recent purchases of the 17-40 f4L, 24-70 f2.8L, and the 70-200 f2.8L IS. Of course my local salesman was I great help as I must have brought home over a dozen lenses to test during that time.
I thought I would return the favor by becoming a member and posting my two-cents-worth in the future regarding these lenses and anything else that I may be of assistance.
My background: Prior to jumping into the digital realm, I held out as long as I could with 35mm and medium format equipment (all primes, no zooms). Near the end of my film days, I had mostly Contax/Zeiss equipment (T2 and TVS point-and-shoots, G1 and G2 bodies and lenses, and RX SLR system). Although I feel that I am qualified to comment on these equipment, I believe that I must wait a bit longer before making any recommendations and comments regarding this current generation of optics and digital bodies.
Thanks again. So long, for now.