Kirk McElhearn posted today about accessing the (kinda hidden) iTunes Store “Power Search” panel:
The trick to making this panel visible is to use this link, which I suppose you could bookmark in your web browser and Command-Tab to that whenever you wanted to power search. But in the last century human beings invented AppleScript to free themselves from time-consuming drudgeries like that.
Just enter this in AppleScript Editor (or click the little script icon to open it automatically):
open location "itms://phobos.apple.com/WebObjects/MZSearch.woa/wa/advancedSearch"
Name it whatever you like and Save it with the Format of “Script” in your ~Library/iTunes/Scripts/ folder. Then assign it a shortcut in iTunes.