Rob and I have cleaned up the Panorama viewer code and made it into a Silverlight Component which can now be easily used in your projects.
The antialias lines have been removed using overlapping, which I've wanted to do for my first version, but hadn't gotten it right quite yet.
After seeing that Florian Krüsch pulled it off in his texture triangle control, I decided to give it another try myself and it worked!
Also added are camera and zoom functions so you can control the panorama from c#
Go to the project page on Codeplex
View the example if you have Silverlight 2beta2 installed.