[joshu]

Never occured to me. Why bother?

Way back there was a second copy of delicious set up at susp.icio.us for testing, but I had to take it down as people were using it.

[unalone]

To be honest, mostly laziness. Probably not a good enough line of reasoning.

And I agree with above: I'm always amazed at the sorts of people that read HN.

[jacobbijani]

I guess just for consistency's sake. And so people like me can see what happens when you take off the subdomain :)