There was a radio play version of I have no mouth and I must scream done for BBC radio 4 back in 2002 as part of Chillers, four tales of terror.

if your intrested you can hear the adaptation here: http://www.youtube.com/watch?v=rSwfpVRVWlo

Thanks for sharing! I had fun listening to it.
A.M. is a scary presence, isn't he? xD

Phantastic!

I loved to listen to Science Fiction radio plays in my youth at night, in bed.

Thank you, for finding this.