Michigan's governor has signed
the Michigan Children's Protection Registry Act. This list will contain minors' mobile phone numbers, instant message handles, fax numbers, and e-mail addresses. There is an up to $250,000 civil claim for advertising products illegal for minors to purchase to minors on the list. Registering on the list is free, but those seeking to use the list must pay up to .03 cents per "contact point" checked.
In terms of sheer scope, ignoring other problems for a moment, the Michigan registry is much better than Utah's in that it only prohibits advertising of a specific set of products, not all content "harmful to minors"--remember that vague definition from COPA. The Utah law also covers non-commercial communications, for example chat rooms or private e-mails, while Michigan targets the advertisers that are the real problem.