Remember the end goal here is to deliver content to the user that they want to spend time consuming. Why use Twitter for anything but another way to find content?
I'm not sure I understand your comparison. What is the difference between finding content I want to spend time consuming, and finding content another way (via some content filtering process), which has every intention of limiting the content to what you "want" to consume.
I agree. The problem is definitely a matter of related vs. unrelated content. My suggestion (or babble) was more so just pointing out how easily we could implement a "source content filtering" logic into an already existing interface.. If we felt that was the best way to go about it.
Just drop the link, some tags, and misc attributes along with a short description.. Is it much more complicated than that?