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Apple has turned the iPhone into a popular device for video games. Sony is about to introduce the PSP go, a slick new version of its handheld PlayStation Portable. But both companies are still playing catch-up with Nintendo, which has dominated the portable game market for decades.

The secret: a steady supply of terrific games. Here's a roundup of some of the best new releases for the Nintendo DS.

It's not easy being a network executive these days. Consider the challenges: While NBC, ABC, CBS, and Fox continue to siphon upwards of 60 percent of the television advertising dollars and to attract the biggest audiences, broadcast revenues are down an estimated 9 percent this year and may never be what they once were. Competition, meanwhile, is everywhere. The cable guys are making some of the most popular shows on TV and are pressing for an increasing share of advertising dollars as companies target the kind of audience niches in which the likes of AMC, TNT, and Bravo specialize.