LinkedIn's frothy shares offering in May, up 100% within hours of trading, cranked up the insanity in the social networking business. Even though Linkedln shares are now 30% off their opening day close, investors and tech entrepreneurs are eagerly awaiting the next one: Twitter? Facebook? What about Jive? Though hardly a household name, Jive Software of Palo Alto, Calif. is catching on quickly with its social-flavored Web software that makes corporate collaboration as easy as Facebook makes the task of sharing vacation photos.
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