PC World - The iPad has been available for a month now in the United States, but the 3G-capable version of Apple's tablet device just launched this past Friday. Apple has reportedly sold more than one million iPads thus far--less than half the time it took the original iPhone to reach that same milestone. If you aren't one of the million plus that already has one, here are some things to consider when choosing between the Wi-Fi only or 3G-capable models.

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