I am about to redesign an app w/ internal messaging (ala Facebook) and just curious to get some input from the UI community on the concept of 'Preview Panes'.
It seems that the majority of the super-popular web applications elect NOT to use a preview pane. LinkedIn and Facebook don't have it. Gmail I believe has it but defaults the user to a non-preview-pane view. Twitter seems to have headed back towards a preview pane with the implementation of New Twitter.
Has anyone run accross any articles/papers/research about this topic. I would be curious to see why some of these decisions are being made from a UX/UI point of few.
I would also love to hear any opinion you all have.