Alas, I don't have any more data than the links you've unearthed yourself. I think it's nonsense to suggest silver itself is dangerous, it's been used as a currency in silver bars and coins for thousands of years. I think it's the tiny nature of the nano particles. They are so small perhaps they could slip through the skin via the keyboard and over time be harmful. If in doubt I'd look at another netbook without a nano silver laced keyboard.
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