SAP announced windows phone 8 supports with the release of Afaria Service pack 3. Afaria is already the most widely deployed enterprise mobile management solution and with highest market share in MDM domain. New release also announced support for touchdown configuration for secure iOS email clinet  in addition to  new features on Android platform . 
Initially features supported by windows phone 8 are as below as per release notes of SP3
 Enroll Windows Phone 8 devices. 
Assign Windows Phone 8 configuration policies appropriate to specific groups. 
View detailed device information. 
Access control and remediation.
Self Service Portal enrollment.

Good news for news for enterprise mobility developers especially those who are looking to mobilize SAP ERP .Now you can try SUP 2.2 without hassle. All you need to do is to create a free account on SAP Community Network to utilize this service and then signup for trial by clicking on below link.
 http://scn.sap.com/community/developer-center/mobility-platform

Note :Its  30 days free trial of SUP with SAP backend ECC 6.0.