okay here's what I was looking for:
The actual payout begins in about 8 hours - so this selling cannot be profit-taking yet.
https://bitcointalk.org/index.php?topic=101902.msg2751536#msg2751536The payouts will occur in 20 batches over a period of a few hours, starting 24 hours or so from the time of EVoorhees's post, around 11PM EST July 17th.
I see varous posts estimating the total BTC to be released from 155K to 320K, approximately. If it's about 200K, and about 20 batches of 10K BTC each -
there's lots more possible selling over the next few days. As a comparison, the volume spike causing today's drop from 96 to 86 took only about 24K BTC... we have about 10 times that amount about to be released into shareholders hands...
http://bitcoincharts.com/charts/mtgoxUSD#rg10zig2-hourztgTza1gEMAzm1g7za2gEMAzm2g20zxzi1gMACDzvzl