Blogging is often a mixture of things, especially for myself. Sometimes you're just rambling on about nothing in particular and sometimes you're trying to link to interesting news for others to read. Cathode Tan works pretty oddly, actually, because there's a pretty small audience who actually pays attention to the former but a much larger crowd (especially thanks to this thing called Google) who stumble through looking for information about one thing or another.
Sometimes they intersect. Like when I complain about a section of a game, I find people will get to that post trying to figure out how to handle the same section at times. Because of this I've changed some of my habits, like always trying to include tips or solutions to help those gamers out.
But I digress.
When it comes to the latter - sometimes you don't find that blog-worthy article or snippet, someone else did. You want to blog about the info, but also acknowledge how you found it. I resolve this usually by including a "via" link somewhere in the post, as I did with the gaming simile one.
Radio Free Blogistan notes this by the slightly more common name, "hat tip", and wonders if it shouldn't be more standardized:
I think this "via link" or "hat tip" should be acknowledged as a well understood, if optional / conditional (only if there is a key source) field in the weblog data model. Not only is it "nice," it would actually make it easier to trace the spread of ideas, a kind of reverse tracking-back.
The tradition follows the concept of a meme, or as Nova puts it a GoMeme, although as Richard Chappel describes it as nearly the exact same thing:
I'm sure I've failed to do it sometimes, although when I did use digg as a source I even tried to maintain the links there so that the article could be further "dugg" as it were.
Just a metapost about blogging in general. As an aside, I would think that if one were a professional blog actually paid to collect and distribute such information - I'd think hat tip and via links as a hard and fast rule would be of the benefit of everyone.