Applicablity of thin-client to voting

I'm seeing this could be an alternate model - where a 
secure server provides all the processing for a voting
system - and the voting clients are little more than
a display device and input keyboard / audio system,
and a single firmware bootup and control program (the
traditional *nix dumb-terminal approach).

http://www.infoworld.com/article/05/07/14/29FEthin_1.html

This narrows the potential attacks to each individual device,
and instead focuses attention on the central server - where
of course - you can marshall some very significant defenses,
and only need to test one component for compromises...

It certainly seems a worthwhile alternate.  There could also
be cost savings - especially if you can get these 
off-the-shelf from banking applications

DW