title: Mail-like Favorites Bar as seen in OS X Lion
body: <p>I'm interested in implementing a "Favorites Bar" in my Cocoa application in the same way that Apple have done so in the new version of Mail in Lion. I thought I had read that this was a standard control now, but I can't find any indication of this.</p>
  
  <p>I've recently seen a similar control appear in the Evernote client when they claimed "Lion-ification of Evernote" which caused me to wonder was there a standard control out there.</p>
  
  <p>So can anyone point me to docs for such a standard control, or can anyone recommend other implementations out there for replicating this functionality?</p>