A little over a year later since Places was removed from the then under development Fx 2, it appears it is finally starting to take shape for Fx 3. From the mozilla Developers News blog:

The Firefox Places team has been hard at work to get the bookmarks portion of Places in shape for it to go out with Firefox 3 Alpha 5 scheduled later this month. And we are excited to let you all know that last week we enabled the Places implementation of bookmarks on the trunk. Although there is still much to be done, this is an important milestone for us.

If you are willing to experiment with this new feature on Fx 3 Alpha 5 Pre (The final Alpha 5 should be released on 2007-05-31) you are advised to backup your bookmarks, just in case. See Bookmarks: Backing up and Recovering for step-by-step instructions. Also keep in mind this is no where close to being a finished product so the UI may not work as desired (but that’s what make beta software so fun!).

Next time I boot up into Ubuntu and update my Fx 3, I’ll take a look at this. Of course right now I don’t have any bookmarks over there. I’ll need to import some from one my Windows profiles. At least I am finally been able to mount my ‘Data’ drive (or may be they’re on my ‘WinXP’ drive) so I can get those files.