One /home/username shared amongst several Fedora instances using external HD

[CB <fedoralist@xxxxxxxxxxxxxxxxx>]

I was thinking of mounting an external firewire drive as my 
/home/username, and then being able to plug this drive into  different 
fedora machines at different times, thus having an identical user setup 
on each machine. Is this feasible? Are  the .* direcories in my home 
directory this portable?

Also, I've seen references to 'automount' around but haven't done any 
homework on it yet. Would I be barking up a reasonable tree in looking 
up how to 'automount' my external drive under /home/username?

Thanks in advance.