I tend to agree with Shawn Blanc’s comment that this mode would be more of a during-the-work-day than during the weekend mode for me.
What I’d love to have is a “weekend mode” in my client. (Or it could even be a separate client.) The weekend mode would show me only mentions, direct messages, and items with links. However, the items-with-links would not include yfrog and similar links: if it’s just a picture of someone’s sushi or their wacky goldfish, I can skip it.