If you are a Safari user and you have a MobileMe account then you can already synchronize Safari bookmarks between multiple Macintosh computers. But what if you want to synchronize to that corporate sanctioned Windows XP machine in the office that runs only Internet Explorer? What if you also want to synchronize to Firefox, running on another machine? All three can synchronize together in one harmonious bookmarking ménage à trois. How is all of this made possible?Xmarks. Formerly Foxmarks, Xmarks now supports more browsers and runs on more platforms. You store a backup of your bookmarks in the Xmarks cloud (which, yes, means that you’ll need to create an account) and then you sync it down to whichever platform you wish. A great solution for anyone who has to jump between browsers on a routine basis, or anyone who doesn’t have a MobileMe account and wants to keep their bookmarks backed up! Also great if you’re having trouble migrating bookmarks between platforms for OS switchers.