Newsvine.com, a new type of news site created by four former Disney/ABCNEWs.com employees, is now up and running in beta. CyberJournalist.net has been invited to join the beta and is impressed with what it's seen so far. The site is a slick combination of some of the trendiest news-related tools online now, incorporating news aggregation, social networking, citizen journalism, blogging, user ratings and online discussions. Think of it as one-part Slashdot, one-part del.icio.us and one-part Google News, with a few other neat features thrown in. The site is built around four general actions: reading, discussing, writing and seeding the news....