My "server-based keymarks" extension stopped working as of Firefox v3.0.  There are <a href="http://en.wikipedia.org/wiki/Comparison_of_browser_synchronizers">several services that provide online bookmarks synchronization</a>...   these would allow me to do the same thing...?

<ul>
<li><a href="http://en.wikipedia.org/wiki/Google_Browser_Sync">Google Browser Sync</a>, though it won't be ported to v3.0
<li><a href="http://www.foxmarks.com/">Foxmarks</a>
</ul>