Blogs are a great way to monitor and even participate in the chatter about your new site.
I vertically center things in tables a lot, and the fact that there is no way to control vertical positioning in divs affects the way we do things across the board.
If I was designing a web site for elementary school children, I might have a much higher percentage of older computers with outdated browsers since keeping up with browser and hardware technology has not traditionally been a strong point of most elementary schools.
If I somehow felt like having a site which strictly validates was an indication of my manhood, maybe I'd do it, but it really means very little to me. We're mavericks over here, what can we say?
We reduced the size of our front page code by about 50%, and by using absolute positioning, we are able to display important parts of the page before other parts may have fully loaded yet.
Our old site did not have very good support for the disabled, but our new site should soon have much better support. With all of our content in divs now, we can hide all but the relevant chunks of content and navigation with a simple alternate CSS file.