Here's an article from CNN.
WASHINGTON (CNN ) -- Republican presidential nominee Sen. John McCain will participate in Friday night's debate with his Democratic rival, Sen. Barack Obama, McCain campaign staff said.
John McCain had said he would not debate Barack Obama Friday unless the bailout package was passed.
McCain said earlier this week he would not attend the debate if an agreement had not been reached on a $700 billion bailout plan for U.S. financial institutions.
http://www.cnn.com/2008/POLITICS/09/26/debate.mississippi/index.html