A pre-Christian prediction of a Messiah who will die and be raised again on the third day: is it authentic?

For a description of the significance of the find, go here. Israel Knohl wrote me in response and was kind enough to summarize the evaluation by experts so far:

The stone and the text were checked by three great experts: The archaeologist Prof. Y. Goren of Tel Aviv University who checked the stone itself; the best epigrapher of this period, Dr. Ada Yardeni, who checked the script; and the president of the Israel Academy of Hebrew Language, Prof. M. Bar Asher, who checked the language. All three agreed that there is no sign of forgery. Yardeni and Bar Asher agreed that the script, the grammar and the style of the document are authentic and that the text is to be dated around the turn of the Common Era.

For an excellent survey of online discussion so far, go here (and look around; it’s a great blog).