Jennie Bowser at NCSL was kind enough to allow me to post her presentation--these were the slides that showed the changes in states requiring Voter ID.

1. No Requirement (36)
Non-Photo ID (10)
Photo ID (4)

2. No Requirement (23)
Non-Photo ID (19)
Photo ID (6)
Strict Photo ID (2)

3. *
No Law or Legislation (3)
Existing Law (22)
Enacted Legislation (8)
Failed/Vetoed Legislation (7)
Pending Legislation (10)

4. No Requirement (19)
Non-Photo ID (16)
Photo ID (7)
Strict Photo ID (8)