From gns3.net :
The GNS3 0.4 release is available. It includes lot of new features and improvements, among them:

A dynamic mode (no design/emulation modes)
A new .net save/load.
c1700 and WICS support.
PIX emulation.
Dynamips’s ATM bridge.
Capture feature for links from the GUI.
IDLE PC calculation from the GUI.
GUI improvements (save the window state when closing GNS3 …)
Annotation feature.
Project feature (you [...]

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