That is too funny!
I believe Berkshire Hathaway simply does not make money from it's corporate website, thus it does not need to spend excess capital on this site.
note it is somewhat usable in that it highlights the basics of Bershire that a user would need to know about.
I especially love Jewelry and car insurance links at the bottom of the page.
I find the official homepage of Berkshire Hathaway interesting (I'm sorry, I would love to put a link to it but this discussion tool won't let me). This is a company that has over $350 billion in assets, revenue of over $100 billion annually