Summary form only given. A recent paper by Abowd proposed collective computing, that integrates the cloud, the crowd and the shroud, defining a new era of "cooperation between humans and computing that enhances both computational capabilities and the human experience." Mobile computing in its current and future states presents interesting developments where tens to thousands of mobile nodes can cooperate in new ways, in order to provide new capabilities and applications, from scalable context-awareness to new distributed computational platforms. Mobile crowdsourcing, crowdsensing, crowd-steering, participatory social systems, mobile device clouds, and cooperative Intelligent Transport Systems are examples. This talk will explore several ideas in crowd-powered mobile computing, including crowd machines, scalable context-awareness, extreme cooperation, and drone services for mobile crowds.