Just dug around a bit and see that Apple will be providing a Developer’s Kit to extend Spotlight’s search engine to other applications.
But the search engine also works contextually within applications such as Apple’s Mail, Address Book and System Preferences—and Apple is giving developers at WWDC a software development kit to help them build Spotlight into their own applications.
eWeek, June 28th
I guess they’re going to reach out to their developer’s community to connect Spotlight to the internet. This should be interesting.