Every Friday, find five quick links about compelling technologies, emerging trends, and interesting ideas. Source: the internet.

1. Yahoo may be back on top: Comscore names Yahoo #1 in U.S. unique visitors, and that’s without counting Tumblr’s 133 million blogs. A little early for Marissa Mayer to proclaim, “How do you like me now?” — but I sure hope she’s thinking it.
2. Have you checked out Whisper? This mobile app for sharing secrets is getting 2.5 billion page views a month. Some terrific UX work and an interesting network structure where users aren’t featured — each post rests on its own merits.
3. Some good data on teens, mobile apps, and privacy from Pew and the Berkman Center. Teens may be getting savvier about their online footprint: those who seek advice about managing privacy online are more likely to disable the location feature.
4. What’s your 14-year-old doing on the internet? In September, she could be networking on LinkedIn as it opens its doors to teens and enables University pages.
5. From teens to seniors: Y Combinator demo day showcased a number of promising startups, but I agree with TechCrunch that TrueLink is a big idea. It’s a credit card that enables families to help their seniors stay financially independent but avoid scams — huge market opportunity there.