[PLUG] bash command to wait for key press

[Brian Quade]

Is there a bash command that you can use in a script that will make the 
script wait for the user to press a key before it continues?  I have a 
script that creates an iso image and then instructs the user to insert a 
cd before calling cdrecord.  But I don't know how to make the script 
wait for the user to press a key indicating that a cd is in the writer, 
or if it is possible at all.  Does anyone know how to do this?