New Signing As Good As His Word
Arnold had admitted to "some fears" that Viduka, who completed a move from Middlesbrough to Newcastle on Wednesday, would pull out of the tournament, while Cahill and Kewell have been battling injuries for the majority of the domestic season.
Everton midfielder Cahill will not be risked in a warm-up match in Singapore on June 30, but will figure in the opening game of the campaign against Oman on July 8.
Former Newcastle defender Craig Moore had asked to be excused by Arnold.
Australia have been drawn in Group A of the tournament and will also face co-hosts Thailand and Iraq.