ESPN viewers can watch World Cup matches in 3D – at a price
Fans in the US willing to pay over $2,000 for high-tech TVs will be able to watch World Cup games in three dimensions
Blu-ray players could top the Christmas list, but the format has a long way to go
Sales of Sony's premium product have disappointed so far, accounting for just 12% of DVD player sales in Europe
The Observer quiz of the year 2009
What links Susan Boyle and The Flintstones? Which bestselling author gets his inspiration while hanging upside down? Fingers on buzzers for the Observer's 2009 annual quiz
Lynn Shelton: Have one great computer geek in your life. It saves a lot of time
Celebrity Squares: Filmmaker Lynn Shelton on why having a geek as a friend is crucial to making the most of a new piece of kit
Do violent computer games turn us into killers?
A film critic on why we should be relaxed about adult themes in videogames
Money pressures force Frost to give Twitter the cold shoulder
Media Monkey: Nick Frost puts his lack of tweets down to working what seems like a three-hour day
E.C. Segar, Popeye’s creator, celebrated with a Google doodle
Google doodle depicts Popeye eating spinach on 115th anniversary of E.C. Segar's birthday
Jessica Haines: what a smoothie operator
Actor Jessica Haines reckons her Bosch blender is the handiest piece of tech ever
Sherlock Holmes and a new twist in game narrative
How a game designed to publicise the forthcoming Guy Ritchie movie pushes the boundaries of the adventure genre.
Tom Felton: I’m a little bit of a geek
Celebrity squares: Harry Potter actor Tom Felton would much rather drive a hovercraft than a broomstick
Filesharers are parasitic freeloaders
Anne Wollenberg: If illegal downloaders had their way, people in the creative industries would be forced into boring jobs and amateur art
From democracy activist to censor?
Jeremy Goldkorn: It's not just British libel law – well-funded legal attacks are stifling free speech and scholarship in the US too
Our top 10 funniest YouTube comments – what are yours?
It's three years since Google bought YouTube, and since then its dedicated army of commenters have developed a language of their own. Here are our favourite comments – add yours below