Companies like Google, Yahoo and Microsoft let advertisers buy ads in the milliseconds between the time someone enters a site’s Web address and the moment the page appears. » Read More

The company is using its network to push the limits of translation technology; its free service has become the favored source for millions. » Read More

ChatRoulette, a nascent Internet phenomenon, is providing Web researchers with a social networking case study into the nature of online togetherness. » Read More

In its wide, wide world, Facebook has the advantage of “network effects” — making its value grow in tandem with the number of people who use it. » Read More

EBay, recovering from unprofitable quarters and falling market share, has recast its site to make it more attractive to new kinds of shoppers, like the carbon conscious. » Read More

An attempt by a public television stalwart to bring the young into the fold with punchy takes on social issues. » Read More

Advertisers on Facebook are a motley bunch. Some are Wal-Mart and Procter & Gamble. Others are “not only creepy but off-putting,” says a media consultant. » Read More

In addition to its standard TV offerings, TiVo, the DVR pioneer, said it would offer an array of related offerings from Netflix, Blockbuster, YouTube and Amazon. » Read More