Is there a place where the NucliOS.app source can be downloaded? Right now I'm emailing the code to myself... but that's a pain. If you end up publishing this same code in the dev guides, then I politely ask that you add that URL to the top of each of these source files for reference. That way, people will see that in-app-source-access isn't the only way to get these crucial tidbits.
If you're referring to the sample browser, you can find the project and source code at the following location.
/Developer/Infragistics/NUCLiOS 2014 Volume 1/Samples
Ah, that helps a ton :) Thanks, Torrey.