This forum on 9/5/11 in SC by Senator Jim DeMint allows for the candidates to speak their views in full length which may prove helpful beyond a debate format. Thought it good viewing though a bit lengthy. Well done by DeMint and starts with Michele Bachmann.
Other video parts:
Herman Cain: http://www.youtube.com/watch?v=lK3TSyUf-bU
Mitt Romney: (go to 6 minute mark) http://www.youtube.com/watch?v=wTlQ3_PKrUk