The Austrailian master of the sulk has been out of favour at the Riverside since the arrival of Yakubu, and he is widely expected to leave before the transfer window closes.
Moyes has made enquiries for other strikers, noteably Robbie Keane and Freddie Kanoute. The former is not keen to move to Everton and the latter is out of our price range at £6m.
Viduka has a poor injury record, and has not exactly set the north east on fire since leaving Leeds United, but at £3m it may well be a risk worth taking (£7m for Peter Crouch!).