This is a good article in understanding which cloud services that one should and one shouldn't. If not understood carefully, cloud adoption can lead into a serious vendor lock-in for life. The low costs of storage encourage data proliferation, and again causes vendor lock-in.
Be careful in which cloud services you consume.
http://gigaom.com/2013/02/26/fear-of-lock-in-dampens-cloud-adoption/
...
“When you move to cloud, you should be increasing your choices, not
decreasing them. You don’t buy three on-premises apps but you can use
three services from three vendors in the cloud,” said Robert Jenkins,
co-founder and CTO of Cloud Sigma, the Zurich-based cloud provider.
...
It’s fairly straightforward to move things off a bare-bones
infrastructure as a platform. But not so easy when higher-end services
get layered atop the platform. Even Amazon fans worry that the edition
of Amazon’s Simple Workflow Service and other add ons create barriers to exit.
