For spanish-speaking audiences, you may find SXGold to be interesting. They offer a partnership program in both English and Spanish (so that you can log in to get codes, check stats etc. in English but display spanish banners and send people to a spanish-language front page)
It's a partnership program run via ibill. Take a look...
http://www.sxgold.com/cgi-bin/redir2...vshareid=gk007
Hope this helps!