Portal's Kim Swift demos Quantum Conundrum — a mind-bending puzzle game with alternate dimensions that modify weight and time #

Ben Purdy's real-life Minecraft block — projection-mapped cube with an Arduino sensor #

Jig goes live — del.icio.us founder Joshua Schachter's new project #

Why Amazon Can't Make a Kindle in the US — fascinating five-part series on America's shift to overseas manufacturing (via) #

Jeff Rubin interviews Muxtape creator Justin Ouellette — years later, very interesting to hear his story of getting sued out of existence #

Akemi, a WebGL and haXe experiment — best viewed in Firefox, part of the Mozilla Labs Demoparty (via) #

Jason McIntosh on Pilgrim in the Microworld, a 1983 book about Breakout — long out of print, Jason's hosting a copy of the book in PDF form #

New Apple CEO Tim Cook: "I'm Thinking Printers" — "It's called innovation." #

Rob "CmdrTaco" Malda retires from Slashdot — 14 years after cofounding the tech community #

Unnerving Korean ghost story comic — needs Flash; you don't need to read Korean to appreciate it, but here's the translation (via) #

Steve Jobs steps down as Apple's CEO — way to go out on top #

The Kid Should See This — Rion Nakaya and her three-year-old curate inspiring, fun stuff (via) #

Terry Gilliam on his process of making cut-out animations — excellent examples of understanding constraints and working within them #

Astronaut Suicides — photos by Sara Phillips and Neil DaCosta #

Jeopardy world champion Ken Jennings competes in the Disney Store Trivia Challenge — also, he wins for most offensive trivia team name ever #

Retaliation, a weaponized build monitor — automatically targets who broke the codebase and fires foam missiles at them (via) #

Talk O' Clock — like using ChatRoulette as an alarm clock (via) #

Dan Cohen animates the "So What" sheet music — shockingly good teaching tool; more here (via) #

Understanding 9/11 — the Internet Archive's 3,000 hours of TV news from September 11 #

Programmable piano in Minecraft — at 1:10, he places notes on the virtual piano roll; he also made a pig-powered slot machine and 5-channel sequencer #

Nieman Lab on curation in the age of information abundance — digital archivists and content curators are important, but great creators provide valuable context #

Vi Hart on the science and math of sound — from my favorite mathemusician (via) #

First look at Disney's Wreck-It Ralph — Disney goes 8-bit in an upcoming feature about arcade characters' secret lives (via) #

The Redditor — monthly magazine created by Reddit members on Reddit (via) #

MC Frontalot's Solved, new album out today — buy it immediately; Front also appeared on Mink Car Cover, a tribute to TMBG's ill-timed album #

The Daily Dot — reporting notable events from major online communities like Reddit, Tumblr, and Twitter #

Gary Hudston's Portal 2 marriage proposal — expertly done, down to hiring Ellen McLain for the voice acting (via) #

Rasta.js — anonymous public cross-domain key store (via) #

Duck Tron  #

Prelude of the Chambered, a 48-hour Ludum Dare game by Minecraft's Notch — he streamed most of the development; see all 500+ entries #

Cow Clicker: The Text Adventure — some context may be necessary #

Maciej Cegłowski on why Arabic is terrific — entertaining and educational, as always #

Gameboy and Intel 8080 emulators running in Garry's Mod — made with the Lua extensions #

Wonderputt — brilliantly creative Flash minigolf by the creator of Icycle #

West Memphis Three freed under unusual plea deal — it's unclear whether they can sue for 18 years of wrongful imprisonment #

Jon Rafman's Codes of Honor — short machinima/live-action film about fighting game culture from the creator of 9 Eyes #

Ben and Julia's Engagement Photos — he never spills his wine #

Golden Grid System — from Joni Korpi, who also offers this nice trick for subtly hiding Typekit font replacement #

Plea deal could lead to release of West Memphis Three — wrongly convicted with coerced false confessions, they've been stuck in jail since 1994 #

Evernote acquires Skitch — and Skitch is now free in the App Store #

Foursquare adds checkins for concerts, movies, sporting events — smart move, now they only need to add support for future plans #

Codecademy — interactive Javascript tutorial to teach coding basics (via) #

Tom Waits/Cookie Monster mashup — too perfect (via) #

Epic Rap Battles of History: Dr. Seuss vs. Shakespeare — featuring George Watsky; also: Einstein vs. Hawking, Darth Vader vs. Hitler #

Whyday is Friday — celebrating the spirit of the singular personality that was _why #

Leonard Richardson's board game data experiments — now's the time to launch a farming wargame, but not another Operation clone (via) #

Safety Instructions — aka "Mavis Beacon Teaches Horrible Death In An Air Wreck" (via) #

Skrekkøgle's sculpture of the Windows Solitaire win screen — while you're there, don't miss their oversized Euro coin project (via) #

Obama's Kickstarter campaign to solve the debt crisis — I'm totally backing Zombama #

The Shapes of CSS — try editing any of the declarations to understand how they work #