Sharing the Widget Wealth

Widgets jazz up profiles and boost traffic, but eat into social networks' ad revenue. Facebook and others ponder a remedy

Call them Web page bling. They're widgets, the shareable programs that let Internet users do everything from display photo slide shows to embed multimedia movie trailers, music, and audio messages. Over the past year or so, millions of Web users have employed widgets to accessorize their pages on social network sites, such as Friendster and Bebo.

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