On June 6, 2012 Library Journal announced that 3M would be donating the copyright for SIP to NISO which would mean that NISO "will now have responsibility for future development and ongoing maintenance of SIP."
The article also correctly points out that
SIP is the de facto standard for communication between library self-service devices and the wide variety of integrated library systems (ILS) that libraries use. It provides the crucial common language that makes possible such widespread functions as self checkouts, automated materials handling systems, PC management systems, or fine and fee payment transactions.
In other words, SIP is really important when we try to integrate ANYTHING with our ILSs. So, given its importance you'd think that there might be something in the works for 2013 at NISO but alas SIP is not the subject of discussion at any of the scheduled 2013 NISO Events.