The central plot of "All the Troubles of the World" is that Multivac was predicting who was going to murder whom. In terms of crime prediction the closest Google has come is mashing up maps and crime stats to show which areas of town are problematic. Unlike Multivac, Google has no interest in being a police officer. Whereas Multivac was built by the government, Google was built by a corporation.
Well, the teletype interface used throughout the robot stories, for one. But you could probably rig that up in an afternoon with a daisywheel printer, acoustic coupler, and just a little bit of tty hackery.
The bit where it understands what you want and gives you one single helpful answer instead of dozens of pages of links to forum posts, each of which contain a clone of the same unanswered question as all the others, followed by some Google adverts.
That's much more profitable than a single answer. Jeez :D
That's much more profitable than a single answer. Jeez :D