Building a Better 'Mobile $HOME'?

numbski asks: "As a systems administrator, I find myself moving from machine to machine to machine on a daily basis. I happen to be a FreeBSD/MacOS X nut, so on a given day I move from my 17" iMac at home, to my 12" Powerbook at work, to any one of my 16 FreeBSD Servers. That's not to mention any of the Win2k Servers that have Cygwin loaded. All of that said, there is a longing in me to have a simple $HOME that all of my systems use and understand. I've considered the Knoppix way of dealing with this problem using a USB key device from this previous Slashdot article, however I don't know how many systems I could get away with consistently having my USB device picked up and used correctly without scripting changes to fstab, not to mention the issue of choosing a filesystem that just about every OS will recognize: FAT32. Windows is going to be unhappy no matter what I'm afraid, as it doesn't understand symlinking. c:\Documents and Settings\$USER can't just be moved off to another volume. The one glimmer of hope I have is this article on ftpfs and webdavfs. Using these one should be able to set up a single, persistent home that follows you from machine to machine over the internet. I guess I would like to know how others have gone about setting up a mobile $HOME. I look forward to having all of my preferences, dotfiles, and bookmarks follow me around."