• ME
• NH
• VT
• MA
• CT
• RI
• NY
• NJ
• PA
• VA
• FL
• Washington DC (technicality)

This list is sad and needs a great deal of expanding.

UPDATE: 2014 Additions

• MD
• GA
• LA
• TX
• NM
• AZ
• CA
• WA

States Driver Through but Not Visited

• TN
• MS