There's a good round-up piece from The Grauniad here. What we know so far in terms of voting advice by shareholder groups is as follows:
ABI - Amber top, with role of chair flagged up
LAPFF - oppose James Murdoch's re-election, support SID's re-election
PIRC - oppose James Murdoch's re-election, plus other News Corp cross directors
Glass Lewis - oppose James Murdoch's re-election (? if Grauniad is right)
That means if ISS oppose or abstain on James Murdoch he will have failed to win the support of any shareholder advisory group. Not good for a FTSE100 chair.