I think so, yes. Basically I want a database of every single link that's been posted to *my* feed. It would also contain any hash tags used with the link, the post ID so I can go back and see the context.
Next I'd strip out all of the "big sites" and focus more on the obscure.
Then if I'm curious about, say # fossils I would get links mentioned in that context.
And if # fossils is used with the tag # crinoids often I could move laterally and find more links.