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Plagued by service outages, the microblogging site rebuilds its infrastructure.
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While failure for the high-tech entrepreneur is less likely to result in death, the parallels between the Gold Rush and the current Web-based economy are many. In both cases, participants must to adapt to a new way of life, with new rules. Or rather, no pre-existing, fixed rules.

A newly launched open-source platform called Identi.ca hopes to challenge Twitter.