You can get a USB flash drive and load a copy of Portable Firefox onto it. Then you could use the same copy of Firefox on your laptop and desktop, meaning you only have one set of bookmarks to contend with. Even better, is it will work on any Windows system with a USB port, since it doesn't require any sort of installation. Not to mention using it over IE makes you much less vulnerable to spyware and other various attacks.
Is there a "simple" way to synchronize the favorites from my laptop with my desktop?