Like to thank Pondus for reporting this, our friend, !Donovan, for his in-depth analysis of the malcode at hand.
See: http://websiteanalystsresource.wordpress.com/2012/09/29/updated-51la-malware-no-antivirus-detects/
I will add some additional information why the site has been hacked in the first place and got infected through blackhat-seo-spam,.
This malware is mostly coming from China.
Read on (links thanks to Sucuri info, article by fioravante souza, and zen-cart-wiki and off-course !Donovan’s article).