Will celebrity wattage in Denver help, hurt Obama?

Kevork Djansezian/AP

In this July 29, 2004 file photo is shown actors Leonardo DiCaprio, top left, and Ben Affleck, top right, during the Democratic National Convention in Boston. From left at bottom are Producer Norman Lear, his wife Lyn Davis and Lear’s grandson Ben Lear. The 2008 Democratic National Convention in Denver promises to be chock full of celebrities again as in previous years.