I also found myself wondering about Biderman's stance on today. His model doesn't seem to turn on a dime, so I would assume that he has not changed his stance, although the stuff he has posted does mention alot of stock available before July 4th, but didn't give me any visibility beyond that. Maybe new offerings are not heading out the door this week. Today must have been another 'Mutual Fund Monday', where the fund managers know they're getting fresh cash.
I think I have already read the Buffett article.
You noticed the VIX/VXN too, I see. I posted some analysis over on aj's thread that might be interesting to you. My current take is that smart money was buying puts today, which seems to be confirmed by your money flow figures for the NDX and MSFT.