From the people that brought us Study Stream language learning platform comes the Spanish MOOC. The Spanish MOOC is an open course for people that do not have any background in speaking or learning Spanish. The course will have twelve graded assignments so that you will get actual feedback on your progress. The course has conversational practice opportunities too. You can preview the course right now by using the guest login on this page. 

The Spanish MOOC course begins in January 2013. Registration is free and is open now.

H/T to David Kapuler.