For anyone in the advertising and marketing industry, I highly recommend watching Spurlock's 20-minute TED Talk about the importance of Brand Transparency and Taking Risks. My favorite quote of the talk is "if you take chances, if you take risks, that in those risks will come opportunity..."
However, if you really just want to see a movie about product placement, then re-watch Talladega Nights with Will Ferrell ("Hi, I'm Ricky Bobby. If you don't chew Big Red, then f-*bleep* you."), especially the family dinner scene where eight brands: Domino's Pizza, Taco Bell, Country Crock, Wonder Bread, Powerade, Budweiser, Coca-Cola and KFC are consecutively shot in the first 7 seconds of the clip below: