The two star strikers will feature on many clubs' shopping lists this summer.
Smith is a diehard Leeds fan while Viduka wants to repay the club for allowing him compassionate leave to visit his sick father in Australia recently.
"I'm very optimistic about the club getting out of this mess," said Viduka. "I sense a buzz around the place lately. Everybody's up for it. Training sessions are looking good, and that is what we need. Everybody pulling together."