Webcasting, Windows Media or Quicktime?

schlarbo asks: "I need to help produce a live webcast and was hoping to get some insight on the process from people with experience. We are a media house in Western Australia that uses Apple computers. We have the cameras, computers and a digital converter for the cameras. However, the big question is: should we use Quicktime Broadcaster, or rent a Windows XP laptop and use Windows Media Player to do the webcast?"