I’ve got a new favorite… Archive Mounter.
I had a collection of .iso files (CD and DVD images) on my Desktop for various purposes, and today I discovered a new feature in the Fedora 9 Beta, courtesy of GVFS. Right-click the file, choose Archive Mounter, and voila! The CD is mounted on your Desktop, and under ~/.gvfs/volume_name, for use like any other user-mounted volume. Love it!
With apologies to A. Krauss.