As Emily mentions below, the star of tonight’s debate wasn’t Barack Obama or John McCain; it was Joe the Plumber, the man from Ohio who now represents middle-class America, thanks to 15 mentions of his name during tonight’s debate.
A few days ago, Joe Wurzelbacher told Obama that his tax plan would keep him from buying a plumbing business. In the debate, McCain tried to capitalize on Joe comments in comparing his tax plan with Obama’s.

When asked about his name being tossed around, Joe said it’s “pretty surreal.”

ADDENDUM: Here’s video of Obama’s encounter with Joe (HT: Victoria):