My Peter Lynch sensibilities (consider what you know from real life) are raising red flags:
1. Have you noticed the little text ads GOOG places all over the web -- how many of them are from fly-by-night junk vendors? As GOOG moves more toward a pay-for-performance revenue model, it takes on more of the risk of non-performing ads, and reduces the risk, to a junky peddler, of jumping up to conspicuous positioning.
2. Will GOOG ever start bringing its inventions out of beta. I still can’t get a gmail account going, and I'm registered for Google.com using my yahoo.com e-mail address. Come on guys ....