There are some available but they were not intended for the job you want so arent exactly cheap. Probably the most suitable would be LEP screens but they are mostly still in development. Eventually the side of the case could be your screen though.
http://www.laseroptronix.se/monit/mone.htmlTBH it would be nice to have a low energy boot up screen on the side of the compy.
http://www.cdtltd.co.uk/press/archive_press_release_index/2002/114.asp