Social bookmarking

Recently there was an article on slashdot about social bookmarking, I myself use del.icio.us to gather my bookmarks. The good thing about such services, except for that they let you organize your bookmarks with tags and let you view bookmarks of other people, is that it is cross platform. The reason I say this is because half the time I work on Windows and the other half on Linux. Sometimes I need a link which I have bookmarked on the other OS, which is really tedious to retrieve. It is much more convenient to set up a live bookmark to the RSS feed of your bookmark and then work from there. There is even a firefox plugin for del.icio.us