Comment by econ

1) that has to be the worse case of premature optimization.

2) just solve the puzzle? The existing domain name system was wonderful when it was introduced.

I'll do a crude solution that shouldn't make it to the short list of goodness: Just make the commercial part into a web directory with all registered businesses. Have some of those filters we are now all familiar with. It might even smoothly transition into a product catalog. Sell placement rather than some random name no one will accidentally bump into. Let's also do a nice tag based web directory for personal websites. Extra points if there is opml

    <link rel="outline" type="text/x-opml" href="webdir://hotel" title="Hotels">

It's not really my problem to solve under technofeudalism but it should be possible to make something modern.