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Campus: Redwood City, Calif.
What happened: The dot-com flameout started moving into its facility in 1999, but Excite@Home declared bankruptcy in 2001. The nearly 1 million-square-foot campus was empty for almost two years but is now slowly filling up.
Headquarters: Santa Clara, Calif.
What happened: Exodus opened its fifth Silicon Valley data center in August 2000. Not long after, the aspiring hosting giant declared bankruptcy. Exodus was acquired by Cable & Wireless in 2002.
Campus: San Jose, Calif.
What happened: Despite concern about competition from Microsoft, then-Novell CEO Eric Schmidt moved the company's Silicon Valley employees into a new complex in 1998. Since then, Novell's revenue has stalled for nearly seven years and most of its executives now work out of Utah, where Novell got its start, and at corporate headquarters in Waltham, Mass. The San Jose campus was eventually sold to eBay.