DDoS Detection with netflow?

Has anyone run across any DDoS/anomoly detection applications that are based on netflow, preferable v9? I ran across a really old application called Panoptis, but it does not appear to have any recent development. Does anyone have any experience with this product or anything similar?

Thomas Magill
Network Engineer
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Cell: (858) 869-9685

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San Diego, CA 92121

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