The Maryland Attorney General's Office serves consumers well by publishing online the data breach notifications it receives from companies and higher education institutions. Notices date from 2008 only. The site also includes resources to assist consumers.
In my opinion, more states should do this. There is no downside. The State of New Hampshire also publishes breach notifications at its web site. Massachusetts currently does not. If your state does, let us know by including the web site address in a comment below.