NoMoreiTunes is an extension for Safari 5 which disables the script that tries to start iTunes when you visit a link to the iTunes Store. It’s annoying and redundant as there is iTunes Preview for Music and Apps now.
Since this doesn’t work on movies I modified the redirecting page for them to show a big button which loads iTunes once (and only if) you click it. I’m working on this one to become a bit more powerful.
I didn’t realise how much I wanted this extension until I heard about it.