Since we're sharing PS1 definitions, here's my most recent:
Code:
export PS1='\[^[[1;36m\]\u\[^[[1;37m\]@\[^[[1;32m\]\h\[^[[0;34m\]\
(\l)\[^[[0m\]:\[^[[0;31m\]\w\[^[[0m\]\$ '
Taken directly from my ~/.kshrc. I can see with which account I am logged in, what server, the terminal name and the current directory.