The blog claims that 27 years ago, while a new industrial park was being built in Jerusalem, a 2,000-year-old cave with ten caskets was discovered, and the names on the ten tombs included "Jesua, son of Joseph, Mary, Mary, Mathew, Jofa and Judah, son of Jesua" and that "film-makers Cameron and Jacobovici claim to have amassed evidence through DNA tests, archeological evidence and Biblical studies, that the 10 coffins belong to Jesus and his family."
It's not clear how DNA evidence could show anything about remains belonging to Jesus (as opposed to relationship between the individual remains), but the comments on the Time blog entry make it clear that we are in for some entertainment in the form of hysterical reactions to the documentary.
UPDATE (February 25, 2007): There's a bit more information at YNetNews.
UPDATE (February 27, 2007): And better coverage at CNN, where experts point out these claims were previously made back in 1996.
UPDATE (March 6, 2007): The Jacobovici/Cameron documentary claims that the James ossuary with the faked "brother of Jesus" inscription was the missing 10th ossuary from the site they claim to be the Jesus tomb. This, however, is definitely not the case, since the person who catalogued the ossuaries at the time of the original find says that the 10th ossuary was a plain, blank ossuary with no inscription at all.
Also, P.Z. Myers watched the documentary so that you don't have to...
UPDATE (April 12, 2007): The Jerusalem Post reports that scholars in the documentary are backing away from their statements made therein...