I love SSHFS. I manage a lot of machines, and I very often want to do something like this:
diff root@server1:/etc/randomrcfile root@server2:/etc/randomrcfile
There are ways to do this with Kompare (a KDE diff app) and the fish:// Kioslave, but not on the command line. SSHFS makes it easy:
mkdir /tmp/server1 /tmp/server2
sshfs root@server1:/ /tmp/server1/
sshfs root@server2:/ /tmp/server2/
diff /tmp/server1/etc/randomrcfile /tmp/server2/etc/randomrcfile
I do this so often that I’ve written my own script to handle this for me, smount. Copy it somewhere in your path, remove the extension (or don’t, as you prefer), and optionally make a copy or symlink called “sumount”. Now you can rapidly mount and unmount multiple hosts.