If you are having long shutdown times in Lion, it is most likely application compatibility issues. That is why many people are reporting success by doing a clean install. My theory is they are eliminating the offending programs. For me it was one of two applications: Fan Control or Techtools Pro 6 (I suspect this one) When I uninstalled these my shutdown times went from 20+ seconds to the 2-3 seconds I was used to in Snow Leopard. Is anyone else that's seeing long shutdown times using these programs?? By the way, I was getting quick sleep times but upgraded my Kodak AIO print drivers and now sleep is taking 25 seconds vs. 2-3. So now I shutdown fast and sleep slow. Can't win for losing, huh.