tweetme_url = 'http://www.techzulu.com/skype-4-is-released.html'; tweetmeme_source = 'TechZulu'; tweetme_window = 'new'; tweetme_bgcolor = '#ffffff'; tweetmeme_source = 'TechZulu'; tweetme_title = 'Skype 4 is released';   Skype  4 (download here) has arrived.But now the Skype team has pulled the trigger and replaced Skype 3.8 with the new version of the chat, video chat, and VoIP client. Improved video calling – With the changes we’ve made, video calling in Skype 4.0 for Windows is the n…