I thought some people might have morbid curiosity in how the new yahoo message format has affected the # of messages posted. Below is a graph of the # of messages posted on ~ 120 message boards as a function of day for 2006. the last data-point is yesterday.
It looks like they've seen a > 2-fold reduction in the # messages. Be interesting to see when/if they recover. To find the # of informative posts per day, divide by 1000.
Also, You don't need to do a fourier transform to find the period: it's 7 days
"Money ain't everything--Unless you don't got any."
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