title: How would one implement a sidebar similar to Mail/iTunes/Finder/etc in Cocoa/IB?
body: <p>I think the title pretty much says it all... I'm looking to implement an interface similar to the standard OS X sidebar used in all the above mentioned programs, and I'm wondering if anybody has any thoughts as to the easiest way to do it, namely about what view to use for the left hand selection pane. Really I don't think I even need the hierarchical component as seen in the apple apps, I just need a good looking flat list of choices which determine what's shown in the right hand pane.</p>
  
  <p>The obvious start is a vertical split layout view, but beyond that I'm not entirely sure where to go. A collection view with only one column or something like that?</p>