Almost unusably slow here also, this is a bad example of a website, because the web/html works better the more one designs for the least common denominator, not pushing it to its limits. Fundamental misunderstanding, mismatch.
No, a site for public consumption should behave consistent in current browsers. Otherwise, the author demonstrates merely his misunderstanding of the web.
No, it shouldn't. Not in every case. If you're building a company site and care about every customer, then yes, make everything compatibile back to IE6. Your aim is to earn money via web, which is only a tool for that; not to make progress happen. But even then you might want to enable some more advanced features for people with better browsers.
On the other hand, when you're building a personal site you can do whatever you want, especially if you want to make a statement, and especially if you are specialized in information and interaction design. You push the status quo and lead by example.
The web is not a static organism. It needs to evolve, it needs to be pushed to it's limits and beyond. If you don't want to innovate (in this particular area), than by all means stay with least common denominator. But don't stop those who want.
The homepage is really usable and (IMHO) looks rather nice in Firefox w/ noscript. Which was kind of surprising because a lot of websites don't degrade well with JS disabled.
