How many stamps to use if im sending a letter from Louisiana to New Jersey?

How many stamps to use if im sending a letter from Louisiana to New Jersey?
As of today, 10-09-2008, for USPS First Class Postage, weight is another controlling factor, not just distance. Assuming a letter weighing under one ounce, i.e. consisting of 5 pages or less of medium-weight paper and nothing else, you can send that puppy anywhere in the continental USA for $0.42. Two ounces will cost $0.59 -- you can find out exactly using this USPS Postage calculator: http://postcalc.usps.gov/