“He (Girardi) told me, ‘I need you at first base,’ ” Giambi said yesterday at Legends Field on the eve of the first full squad spring training workout. (Source) 

Girardi said he hoped to get Johnny Damon 600 plate appearances and is committed to him as the every day left fielder. (Source)

LF Damon
SS Jeter
RF Abreu
3B ARod
1B Giambi
C Posada
DH Matsui
2B Cano
CF Melky

The order is tentative, but this is probably the lineup you’ll see the most times in ‘08.