I doubt this one will ever leave Korea, but it sounds cool: the HiPDA combines a PC with a touch screen and a digital DMB TV receiver, plus a HSDPA high-speed data connection into a package weighing just 1.3Kg. The processor is a rather slow 500MHz AMD Geode, so I wouldn't expect it to be a speed racer. You can get a Google translation of the review here.
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HiPDA [Akihabara News]