This set of slides from Cyril Mottier on Speaker Deck explores a particularly useful element of Google Play services: The Google Maps Android API v2. The API allows you to embed maps (standard or customized) in your application and leverage Google's vector-based maps.
Mottier's slides, titled "Getting around with Google Maps Android API v2," provide an overview of the API, but then dig deeper into implementation and various tips for better productivity, complete with code samples and illustrations. The slides also include Mottier's usual attention to detail in terms of style - these aren't just black text on white PowerPoint types.
For an overview of the Google Maps Android API v2, a tutorial for working with it, and a few tips and tricks to help you get the most of it, check out Mottier's slides on Speaker Deck.