I use multiple Linux distros, and occasionally I'm on the internet with Windows Vista, so I finally decided give the Firefox synchronization tool XMarks a try.
XMarks is the new incarnation of Foxmarks, and is available as a Firefox add-on. It synchs your bookmarks between different operating systems and/or computers.
So far, it's gone off without a hitch. XMarks comes with a friendly GUI, and places an icon conveniently at the bottom right of the Linux Firefox window. It includes a "Discovery" module that helps XMarks provide you with top sites based on your Google search, site info, and automatically suggested tags. I turned off all of the Discovery options.
Good add-on for Firefox users who multi-boot or use multiple computers -- your bookmarks are always available!