Nintendo DS Mystery Port Revealed?

In more microphone news today, both Spong.com and GamesIndustry.biz are claiming the mystery port a Nintendo spokeman revealed last week on the Nintendo DS, is for an external microphone of sorts. GI says the port is "designed for connecting a special headset, whose connector would include both audio in and out plugs." I don't know. I liked Lizking's suggestion: "It is a port that taps directly into your wallet and sucks your money out. Nintendo is finally taking the direct approach to draining its customers dry, instead of hiding behind the vail of innovation."