Faster, Easier Product Development: Delicious Library Takes Advantage of Cocoa Bindings
Apple does geek marketing better than anyone. This "developer article" is really written for a non-developer to read; it's a marketing document. Still, it does reveal a lot of interesting things that were introduced, without much notice, in 10.3.6. Much of this is fundamental to Tiger (based on what I read in Apple's Tiger notes).
Anyone interested in "search" (meaning everyone nowadays) will appreciate the comments on search.