Hi Anindya:
I followed up with team working on the integration. Here's the guidance they offered:
“As per current status, message based integration, SSO and On-boarding of SNC suppliers using Ariba Network is planned to be delivered in Q3/Q4 2014 along with 13s SCM release.
Specific details of the integration will be communicated using standard channels like on-line documentation and release notes of this solutions at the time of RTC(release to customer) and also covered in various sessions in events like Ariba Live, SAP Insider and SAP SAPPHHIRE. It is also advised that Anindya contact his SAP/Ariba partner mgmt. team to request any specific additional information from SAP/Ariba ahead of RTC."
Regards,
Debbie