Linked In Valuation

LinkedIn valued at $1 billion. Not even close to Facebook but that is likely a reasonable valuation. If I had money I probably wouldn't invest at that valuation but maybe at $500 mm or even $750 mm. I don't know how they are making revenue but I think LinkedIn has a good product, which is geared towards professionals, not college kids and 30-somethings who still act like college kids (aka my friends).