Hi Oliver
Yes it is available . it can be registered from Mobile Secure | Mobile Solutions | SAP. Its just another offering from SAP where Afaria Cloud is offered as SAAS- Software as a service reducing the complexity of maintaining the servers. .
More details of Afaria Onpremise and Cloud can be found at SAP Mobile Secure, cloud edition – SAP Help Portal Page and SAP Afaria 7 SP4 On Premise – SAP Help Portal Page