I've always wondered whether people that are legal and lived here their whole lives are eligible for DREAM Act.

As it is, I don't see why not, as long as you meet the standards I think it would apply to you. There's no part of it that says illegals only. It just tells you that you need to prove that you came here before the age of 16, been in the U.S. 5 years before the bill is signed, have a High School diploma, good conduct, and be between the ages of 12-35.