Facebook has turned up the heat on Google by purchasing content-sharing service FriendFeed, say industry watchers.

Many expected Google or even Twitter to buy the company, which has been praised for its "real-time" search engine. This type of search is valuable because it lets you know what is happening right now on any given subject.

"Google look out, Facebook knows the real money is in real-time search," said respected blogger Robert Scoble.

More: http://news.bbc.co.uk/1/hi/technology/8194508.stm