Tech Investor News - Always Updating Technology Financial News
http://www.techinvestornews.com/page-one.html
Corporate Tweets and the SEC: Sometimes It’s Better To Keep Your Mouth Shut
http://www.techcrunch.com/2009/05/03/corporate-tweets-and-the-sec-sometimes-its-better-to-keep-your-mouth-shut/

Disclosure and the web.

Good article on corporate disclosure and social media