"Purdue University has changed practices regarding tuition and fee assessment for active duty military personnel. Starting with the Fall 1998 semester, a waiver of non-resident tuition for twelve months is available for active-duty personnel who are stationed either in the state of Indiana or at Purdue University. During these twelve months, military personnel who are attending Purdue could satisfy Indiana residency requirements to make them eligible for continued resident tuition rates."
That's right off the Purdue webpage, as soon as I have my orders I am going to take advantage of this. I know that other public institutions may have different rules, but its worth a try.