SEC Says Companies Can Use Social Media to Alert Investors - WSJ.com

Another Netflix-initiated innovation (see the full article for context)

"Executives with itchy Twitter fingers can rest easier after federal securities regulators blessed the use of social-media sites to broadcast market-moving corporate news.
In a ruling that portends changes to how companies communicate with investors, the Securities and Exchange Commission said Tuesday that postings on sites such as Facebook and Twitter are just as good as news releases and company websites as long as the companies have told investors which outlets they intend to use."

SEC Says Companies Can Use Social Media to Alert Investors - WSJ.com