In Tom Clancy's Splinter Cell: Chaos Theory there's blatant advertising for a certain product. First time I've noticed this in a game, but I don't play games that often. It's a bit irritating, like most advertising, but inevitable due to the huge popularity in gaming. I see no harm in it, and the increased revenue for the games developer will (hopefully) mean better games.
so what's wrong with seeing them in films/TV programmes and games? As long as the placement isn't intrusive it's simply a product, or a name being displayed in a lifelike setting - or in the case of games in a setting that often bears little resemblance to real-life.
Games such as PES and FIFA (both football sims) use advertising on their boards, which not only makes the game better as it gives increased revenue to Konami and EA respectively, so they can improve the games, but it makes the game look more realistic: