[hcho]

Are you aware of the fact that HN is open source? There's also Reddit and Lamernews. You can pick one and re-skin for your purposes I suppose.

[sgdesign]

I am well aware of this, but Arc doesn't seem like a very popular language.. I could adapt Lamernews I suppose, I'll have to look into it. But in any case, the customisations I have in mind will probably require some outside coding help.