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Looking at the link, I'd love to see most of these features implemented in Leopard... 🙂

But as for your question, isn't this a competition based on "fake screenshots"? I don't think there is a way to "customise" Safari to anything like what you see here.

Then again, I hope I'm wrong, and that someone comes up with the answer 😱

That's not Safari...that's the Finder that Eric has designed/photoshopped.

Safari is another one in his 'portfolio'. Click on his entry, then it's the third screenshot...
 
No, there isn't a way. Safari 3 is going to bring some pretty neat features though (but no History thumbnails AFAIK).

For all your Safari customizing needs check out PimpMySafari.com
 
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