  The vision of augmenting computing capabilities of mobile devices, especially
smartphones with least cost is likely transforming to reality leveraging cloud
computing. Cloud exploitation by mobile devices breeds a new research domain
called Mobile Cloud Computing (MCC). However, issues like portability and
interoperability should be addressed for mobile augmentation which is a
non-trivial task using component-based approaches. Service Oriented
Architecture (SOA) is a promising design philosophy embraced by mobile
computing and cloud computing communities to stimulate portable, complex
application using prefabricated building blocks called Services. Utilizing
distant cloud resources to host and run Services is hampered by long WAN
latency. Exploiting mobile devices in vicinity alleviates long WAN latency,
while creates new set of issues like Service publishing and discovery as well
as client-server security, reliability, and Service availability. In this
paper, we propose a market-oriented architecture based on SOA to stimulate
publishing, discovering, and hosting Services on nearby mobiles, which reduces
long WAN latency and creates a business opportunity that encourages mobile
owners to embrace Service hosting. Group of mobile phones simulate a nearby
cloud computing platform. We create new role of \textit{Service host} by
enabling unskilled mobile owners/users to host Services developed by skilled
developers. Evidently, Service availability, reliability, and Service-oriented
mobile application portability will increase towards green ubiquitous computing
in our mobile cloud infrastructure.
