Lists for nerds

What is with the Internet's obsession with numbered lists? Right now on del.icio.us's popular page are:

• 30 Scripts For Galleries, Slideshows and Lightboxes
• 25 Code Snippets for Web Designers
• 50 Ways to Increase Your Productivity
• Do It Yourself: 12 Cheats for Independent Entrepreneurs
• Open Source Projects: 15 To Watch
• Collection: All 6,288 Smithsonian Images
• 8 web menus you just can't miss
• 世界の最もきれいな都市トップ25
• 「あなたの生産性ã‚'高めるための50のTips」ã‚'自分でも作ってみよう！ | P O P * P O P

I should probably name my next album 11 Songs for Developers You Can't Miss (Will Increase your Productivity).