http://www.noheat.com/2007/06/18/easily-sync-your-bookmarks-to-anything-even-your-mobile-device/

There are many ways of transferring your bookmarks from Computer to Computer but one of my favorites is very simple. All I do is go to the Bookmark Manager in Firefox and export my bookmarks. Then I email myself the bookmark file with Gmail. Once you receive your email you click on the view attachment button in Gmail. This opens up the html document where-ever you are even on your mobile device.