In Case of Tech Bubble, Do Not Break Glass

In Silicon Valley, it's beginning to feel like déjà vu all over again. Much as in the early-to-mid-90s, a euphoria is surrounding new consumer technologies. Then, it was early Internet software, such as Netscape, and such dot-com darlings as eBay (EBAY) and Yahoo! (YHOO). Now the excitement involves mobile devices such as Apple's iPhone and iPad and social network services such as Facebook.

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