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Technology blogs TechCrunch and AllThingsD reported that the San Francisco microblogging upstart has raised at least $50 million in a new round of venture capital that values the company at $1 billion.

Twitter, which lets you share your thoughts online — but only if they can be kept to 140 characters or less — has generated a lot of buzz, but not a lot of revenue. ($1,000,000,000 — that's 14 characters right there.)

Original Article: Is Twitter worth $1 billion?