The way I use Terminal, I usually have a cuple of windows open, one with my primary 'screen' session, one with irssi, one or two random sessions depending on what I work on, you get the idea.

Since I use iconbox, I end up with several identical icons and it would really help to give them an icon each, like so:

Terminal --icon /mnt/dango/kram/lanedo.png
Terminal --icon xchat

So --icon would work analogous to --title but take an absolute filename or a themed icon name.