Another thing that just occurred to me: since you're presenting the tweets out of their context, sorting them purely by user, perhaps it'd be better to remove replies from the flow? That way snippets of conversations wouldn't confuse the reader. I'm assuming this view is meant to find standalone tweets that contain insightful remarks or links/media?

Also, how about auto-converting links in tweets into embedded media? (images, YouTube, etc)

auto-converting links.. didn't occur to me at all. Thanks to remove re-tweets, I should probably set that as the default option (removed) and yet provide the user a way to turn it on