Dear Yahoo customers:
When technology news reaches the national news, you can conclude one of two things
1) There is a major problem
2) The media has gotten it wrong.
500 million Yahoo accounts have been compromised. This is a #1 scenario. It is recommended that you change your Yahoo password immediately. If you have a plain vanilla Yahoo account you can follow the steps posted in this official Yahoo article.
On that page you will find special instructions if you have have internet with Frontier / ATT or other internet provider that provided you e-mail with Yahoo (including @sbcglobal, @att, and @snet)