Search Trends - Search Engine Marketing

I saw the movie National Treasure this past weekend. It was pretty much your typical Nicholas Cage adventure flick, but I quite enjoyed it, regardless. One thing I noticed was that there were a couple times they needed to know some important fact, they turned to a web search. Also interesting was the fact that they used Yahoo to conduct their searches. I don't think it was coincidence they did that. I'm sure they worked out some kind of product placement deal, or more likely, a cross-promotion deal with Yahoo in exchange for using their search engine. It's a great way to help people feel like they're a part of the action--even though they'll probably never get a chance to steal the declaration of independence and pour lemon juice on it to find the hidden clues that will lead to a room full of priceless treasure, they can always pull up a browser window and do a search on Yahoo, which I guess is the next best thing, right?