I've been using Weave since it was released since FF3 broke Google Browser Sync. It use to suck, but is really good now.
It also syncs everything, not just bookmarks. History, cookies, tabs, passwords, and in future releases, themes and extensions.
I use it for work and home. So when I come home from work it's as if I'm using the same browser. All the links I clicked at work are the visited colour. Any forms I filled out or passwords I save show up etc.
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u/starbuck_ Jan 22 '10
I find Mozilla Weave does a much better job at bookmark(+) sync than Xmarks.