I've always thought that 'Web 2.0' at first just meant that a site had user-generated/submitted content - so by that definition news.yc would be web 2.0 because

I've always thought that 'Web 2.0' at first just meant that a site had user-generated/submitted content - so by that definition news.yc would be web 2.0 because pg does not post the stories and decide what we see.