I was just playing with that today…
There is another version of kibitz in this package:

sudo aptitude install expect-tcl8.3

and then I linked it to /usr/local/bin/

sudo ln -s /usr/share/doc/expect-tcl8.3/examples/kibitz /usr/local/bin/

(the perl version messes up my newlines after it exits, the tcl version no)

I am not sure what the difference between the two version, but I will print out the source when I get to the office and see how they do their magic under the hood.

Ivan

BTW: The work “Kiebitz” designates the person sitting next to you on a table (say you are playing Poker) and watches and gives advice.
Ex: In chess a kibitz is not allowed to speak — only watch.