Branding is about values and communities. There is a brand community. And now there's the financial community.
I believe that the most important fact is that google has become – as every sucessful brand - something human, something social. Google is friendly, looks like a smart hobbytool with maybe 20 people behind. It's a friend you invite into your computer, your home and its not a part of corporate america. Thats the most important brand facts that are creating all the spirit and power behind the brand.
From this point of view the ipo must be something social, something shared. Google follows with its/his ipo-strategy this key facts. But i don`t believe that the financial community is thinking the same.