[A.N.Onym]

Well, technically speaking, publishing your content in Digg comments is pushing boundaries of copyrights. You are interested in your digg entry being popular and more people clicking through to your site, right? A snippet or two (or a quote) may well worth including in a comment (or better yet in a description) to get more click throughs.

But yes, completely copying the post sounds like some violation, which should become more common and tolerable in the future, I suspect (with all these open source, power to the customer, movements).