Apple

Do all roads lead to Cupertino?

Aqua
The new Mac OS X interface.

Cocoa
The technology based on NeXTSTEP which runs the new OS X.

Objective-C
The programming language used to create both NeXTSTEP and its successor Cocoa.

Darwin
Darwin is the open source FreeBSD/MACH kernel of OS X.

The Mac Channel
Apple news resources at the Register.

Tales of a BeOS Refugee
The author of the BeOS Bible gets off the train in Cupertino and figures it might be worth hanging around.