not too sure I understand your question.

but there are Fast Dial users who use Xmarks (was Foxmarks) to synchronise Fast Dial on different machines.
This works as Fast Dial information is stored in Firefox Bookmarks

Please download here
https://addons.mozilla.org/en-US/firefox/addon/2410/
or
here
http://www.xmarks.com/

Is that what you wanted ?

Many thanks