Once again, the partnership makes more sense than you might think. Google (or rather, Alphabet) already said that it wasn't going to mass-produce its own cars, so it was always going to need help -- this is its first major deal. Fiat Chrysler, meanwhile, has been hoping for a fast track to self-driving technology to help it compete against rivals that have already done a lot of legwork.
And minivans? They could make more sense than you think. While you're unlikely to see truly driverless Chryslers anytime soon, this would show that Google's know-how can improve one of the most mainstream vehicles you can find: a run-of-the-mill (if relatively high-end) family carrier. If Google and Fiat Chrysler succeed there, the technology could easily spread to other models and manufacturers.
Update: Yes, it's official.. although it's not quite how it was originally portrayed. Google is adding "about 100" Pacifica hybrid vans to its fleet of self-driving cars, the first of which will hit the streets by the end of 2016. Sorry, folks, you won't get to drive one yourself. Fiat Chrysler is making it easy for Google to install its systems, and the minivan design conveniently allows for testing larger, more passenger-friendly vehicles that can incorporate features like "hands-free sliding doors."