If you were missing the Gloobus CoverFlow, we have great news! The Gloobus devs are working on a new Gloobus Flow which is integrated into Nautilus:
To install it, you need the latest Clutter and ClutterGTK from GIT, then get Gloobus Flow and the patched Nautilus from HERE. A complete how-to for installing all these will come sometime later today (hopefully).
Update: the how-to is ready, see: How To Install Gloobus Flow (Clutter) With Nautilus Integration In Ubuntu
[via Gloobuls blog]