Science and Nature should disclose the reviewers and their comments. Given that the work upon which the papers are based must be several years old, and that this sort of work is being widely attempted, serious misconduct as apparently happened here should be detectable or at least suspected. Did the reviewers question the data?
Update
South Korean Researcher Resigns From Post
http://news.yahoo.com/s/ap/skorea_stem_cell;_ylt=Au0X1DUj.WxBfi.Vfmc6rRSs0NUE;_ylu=X3oDMTA2Z2szazkxBHNlYwN0bQ--
SEOUL, South Korea - South Korean researcher Hwang Woo-suk resigned from his position as a professor on Friday after his university said he had fabricated the results of at least nine of 11 stem-cell lines that he claimed to have created.
"I sincerely apologize to the people for creating a shock and disappointment," Hwang told reporters as he was leaving his office at Seoul National University. "As a symbol of apology, I step down as professor of Seoul National University."