Early this morning we reported on how Samsung released a v1.1 of the new Tango video-chat app and now HTC has followed suit as well.
We're not sure what exactly is different between this and the generic Tango app outside of the version change. The app description suggest it integrates with the People Hub but we haven't see that just yet (though perhaps they mean it looks up your contacts.) But what we do know is that HTC and Samsung both have worked closely with Tango on this app, meaning these specialized versions probably have some device-specific tweaks in them to make 'em work better.
Of course as noted in the description, this is only for the Radar and Titan, so we're assuming they're optimized for those phones.
Grab Tango for HTC v1.1 here in the Marketplace.