n., pl. -shareholics.
Individual addicted to posting online everything they see, experience or think.
One who compulsively posts their whole life online ala Facebook www.Facebook.com, Twitter www.Twitter.com, Digg www.digg.com, etc.
She was such a shareaholic she found herself thinking in Facebook status updates, and felt a deep sense of well-being when she discovered Shareaholic www.shareaholic.com