quick OS X iTunes tip
I find the arrow links in the iTunes library excruciatingly useless when they link to the iTunes Store. They SHOULD link to your internal library instead. (Hint: Holding OPTION while clicking the link DOES take you to your internal library)

I have used a number of different downloaded scripts to change this default behavior in the past, but I always forget which one I used. This afternoon, some Googling led me to the simplest and best solution I have found thus-far. Thanks to a super-brief article on macosxhints.com, I found this line of code that you copy/paste into a terminal window to permanently change the behavior:
defaults write com.apple.iTunes invertStoreLinks -bool YES
That is all it takes to invert the behavior. (The original article was written for iTunes 4.5, but it works just fine in my 7.0.2) Close iTunes. Open a Terminal window. Paste this in. Press enter. Done. Open iTunes and now clicking the arrow links goes to the internal library and OPTION-clicking goes to the iTunes Store. Perfect.

Doesn’t the little curved arrow button on the right side of the iTunes display (track info/equilizer animation) do the same thing?