Firefox in sync

There are 3 or 4 individual computers I use with any regularity between work, home, and while I'm on the road. I pretty much use Firefox on all of them and I just found a great extension that synchronizes the bookmarks across all of them automatically. The Bookmarks Synchronizer exports and automatically FTPs all of your bookmarks to an FTP server you specify. Each of your other computers can then automatically download the file and import the bookmarks. From then on, any machine can upload updated bookmarks which are then downloaded to the other machines. It works great, and is cross platform - the Firefox bookmarks on my Mac are identical to those on my Windows PCs.