Tango 1.4 Compared to Tango 2
Fully-integrated e-mail support - +
"Awareness" service (like AIM) - +
Site-configurable/customizable interface + +
Internet Explorer support - T2.1
"Out-of-browser" implementation - T2.1
Shared visualization - T2.1
Shared compute engine + +
Shared web-linked database + +