You can transfer calls to any of your Skype contacts for free. You'll have to pay SkypeOut rates if you transfer a call to a mobile phone or landline.
There's also a call quality indicator, improved functionality with the Winodws 7 taskbar and system tray, and improvements to the contact importing utility. Now that the Google Chrome web browser supports plugins, Skype has also added a Chrome plugin to its list of browser tools. Firefox and Internet Explorer plugins were already available.
In other news, Skype also introduced a beta version of its chat and VoIP client for Symbian smartphones today. The software supports a number of Nokia phones running Symbian Series 60 software. You'll need 6MB of free space on your phone to install Skype for Symbian.
Skype Beta 4.2 for Windows