1.F1>5年就能按resident alien报联邦税。那么03年暑假来美能算resident alien么？不能的话，可以用183天rule吗？

no, you could file 1040 from 2008

2.直接用于减免学费的奖学金，算是income吗？

The income should be the money you really make, so if you didn't make money, then you shouldn't have any income(that's why you don't have a w-2 form)

另，我没有收到任何w2。。。