My SportsBLOGS colleague John Sickels has posted a detailed report on Cubs minor league prospects today over at his site minorleagueball.com. There are several players on his top 20 list who will get good long looks at spring training, and may even make the major leagues this year.
Actually, Dusty Baker, even with his reputation as not liking to play younger players, gave minor leaguers significant playing time in the late innings of games last spring. I'd expect him to do the same this year.