Did you hear the news? if you head to a Best Buy before its too late (though, honestly, at this point it probably is) you could buy an HP TouchPad tablet for $100! The rub is that the tablet won't be supported or updated due to the fact that HP has ceased production of the TouchPad a little over a month after its introduction. It's also killing off the WebOS mobile operating system two years after it debuted on the Palm Pre. Sounds a bit...premature, don't it? Yep. HP's not the first company to quickly dead a product. Remember the Microsoft Kin? Or the Gizmondo? Those are only two of the 10 Most Short-Lived Gadgets.