The Wall Street Journal reported soon after trading of Facebook's stock began that LinkedIn's stock price was down 2.6% and Groupon was down 6%. Pandora also was down, dropping 5%.

Zynga, though, might have fared the worst. The online gaming company's share price toppled a full 13%, landing at $7.17, . Trading on that stock was halted, later reinstated, then halted for a second time.

Sharon Gaudin covers the Internet and Web 2.0, emerging technologies, and desktop and laptop chips for Computerworld. Follow Sharon on Twitter at , on or subscribe to . Her email address is .

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in Computerworld's Web 2.0 and Web Apps Topic Center.