Daniek Jalkut, founder of Red Sweater Software who make Mars Edit, wrote a Safri extension he wrote:
The motivation behind my foray into Safari extension development was my early adoption of Safari 6 during the beta phase. I noticed they had removed the long-standing, built-in “RSS” button near the URL bar. This button makes it easy to subscribe to an RSS or Atom feed for a blog, or any other site that offers such a feed.
I’m disappointed by Apple’s decision to remove the button, but when life hands you lemons …
I’m still installing Mountain Lion but toyed with Safari 6 while it was downloading. It was an obvious change that I wish Apple hadn’t made. But I’m going to enjoy Daniel’s lemonade.