Fraud In Stem Cell Research?

I've been following the news about the head of the World Stem Cell Hub, Hwang Woo-Suk, and his possible research fraud. Based on the research he has done, he is considered one of the leading stem cell researchers in the world. Some of his associates, as well as other stem cell researchers, claim that his work is fraudulent. At this point he claims his research is legitimate and that he has created 11 lines of stem cells.

The latest news story is:
S.Korean Stem Cell Researcher Defends Work.