MtGox: 100% Chargeback protection from moneybookers.com for webstore merchant accounts can be arranged, see http://www.moneybookers.com/app/help.pl?s=m_fraudcontrol .  

Cash Payment Systems eliminating charge backs:  In US is paynearme.com  (pay near me) and Internationally ukash.com



Would Bitcoin be a unique/licensed download product?  Each key is definitely unique, and the key is uniquely assigned as property owned by the key holder.  Moneybookers.com do not accept merchants from unlicensed download industry, see http://www.moneybookers.com/app/help.pl?s=merchant ,  as unlicensed product download is just a bunch of non-unique identical digital copies of a certain kind, which is not the case with Bitcoins.  Bitcoin keys being unique, would provide prove in the block chain database whether the unique numbered product was delivered or not.

Another elimination of risk of charge backs is a cash system called Paynearme.com http://www.paynearme.com/merchants/faqs but is only available to US customers.  Another cash system which should eliminate charge backs and where merchants may sign up, is called Ukash and is available internationally.  http://www.ukash.com .