Agree with @Thawne this is a great idea.

I would suggest however that as awesome as the name Agora is. (And it's brilliant, I love that you've used another language to give a punchy one liner) To a standard passer by scrolling through the home page of SN they might not get it. Perhaps Market_Place would be straight to the point for people just scrolling passed not knowing what Agora is.

But seeing as ~marketplace already exists, perhaps Agora may he able to carve itself a role out in a more niche way?