Cloud Computing aims to provide scalable and
inexpensive on-demand computing infrastructures with
good quality of service (QoS) levels. More specifically,
this involves a set of network-enabled services that can
be accessed in a simple and pervasive way [10]. Cloud
Computing provides a compelling value proposition for
organisations to outsource their Information and
Communications Technology (ICT) infrastructures [6]. It
also provides added value for organisations; saving costs
in operations, resources and staff − as well as new
business opportunities for service-oriented models [2,
3,10]. In addition, it is likely cloud computing focusing
on operational savings and green technology will be at
the centre of attention. To avoid repeats of Internet
bubbles and to maintain business operations, achieving
long-term sustainability is an important success factor
for organisations [4]. In this paper we review current
cloud computing business models, and provide
recommendations on how organisations can achieve
sustainability by adopting appropriate models.