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Creator: Go Smart Solutions
Other than picking a background, Twitter users don't have many options for customizing their pages. So instead of filling this space with a pretty picture, many people choose to turn it into a personal business card, displaying information about where they work and where else they can be found on the Web. TwitBacks, one of several personalized background services, offers these images free. TwitBacks' developers expect to generate about $22,000 this year from a separate service that, for a $10 fee, helps generate exposure for a Twitter profile.
See also: TwitterImage.com, Flickr my background (sawhorsemedia.com/flickr-my-background), and Twitart (www.twitart.com)