Sony Vaio - Brightness Level
There was a thread last week that actually came up with a good "down and dirty" monitor brightness tweak: http://forums.dpreview.com/forums/read.asp?forum=1004&message=40217911
I use the histogram in CS5 too, but for actual monitor adjustment this seems to work pretty well and anyone can do it.
Turns out I had my monitor set WAY too bright--about a stop and a half! I make a copy of the results and keep it with my Spyder puck.