Walkman. According to Tokyo-based research firm BCN Inc., for the week ending August 30th, the Walkman series had a 43 percent share of the personal music player market versus 42.1 percent for iPods, marking the first time in four years that Sony's managed to get the upper hand. Got that? Good, now for a major caveat. For whatever reason, iPhones aren't considered part of the iPod line, meaning people who want the luxuries of the iPod touch and a wireless data plan aren't included in the survey. That's quite an omission -- the iPhone 3GS is currently the best-selling phone in Japan, after all -- and we gotta imagine it'd be more than enough to tilt the data in Apple's favor, even if you threw in Sony Ericsson's Walkman phones for good measure. But hey, it's still a feat in its own right, and Sony might as well celebrate while it lasts -- something tells us the gang in Cupertino has something up their sleeve soon.