Syncing bookmarks now that Xmarks is shutting down

Xmarks has been my tool-of-choice for backing-up and synchronizing my browser booksmarks for a couple of years now, mainly because it had plug-ins for Chrome and for Firefox - the two that I use then most. It ensured that no matter which browser I was using on any machine, all my links were the same. But it seems that they will be shutting down this service (at least their "free" service) on January 10, 2011. From their notice:

Sadly, Xmarks will be shutting down our free browser synchronization service on January 10, 2011. This page contains details on how to transition to recommended alternative services. For more detail on why we're closing our doors, please see our blog post.

So what are the alternatives they recommend?

Firefox is the browser that I use the most so this solution is the most important to me. There's a few options for Firefox, but I'm going with Firefox Sync. If for no other reason than its from Mozilla.

Chrome is my second choice and I use this one mainly for accessing Google applications on the web. Initially I tried their built-in sync which is suppose to store the links within my Google account. At the time (and now I suppose) this seems like the best solution for Chrome but the sync didn't work well and I ended up with duplications often. I guess I'll be trying it out again.

I only use Internet Explorer for accessing sites internal to my corporate clients, so I have never been worried about syncing these bookmarks. With IE9 coming out, than might change however. So with no real opinion on this one I'd guess that Microsoft's own solution is probably the easiest and most seamless to use.

And then there is Safari, whose best solution is probably Apple's MobileMe, at $99/year. Granted, MobileMe does a lot more than syncing bookmarks. But that's all I need it for so its not worth then money to me.

But the big question is: what is the best tool available now to keep all of these in sync with each other?