Coursera offers several great online courses from the best universities around the world. The courses involve video lectures being released weekly, work assignments for the student, and reading material indications.
I had enrolled on this course about BigData a couple of months ago, and I confess I didn't have time to start doing it since last week.
Once I started the course I was pleased with the content presented.
They talk about important Data Mining algorithms for dealing with great amount of data such as PageRank.
MapReduce and Distributed File Systems are also two very well explained topics on this course.
So, for those who want to know more about computing related to BigData this course is certainly recommended!
PS: The course is being offered since march, and its inscriptions period must soon be over. But keep watching the course page, because they open new courses often.