Inductive Automation is sending programmers to the OPC Interoperability Conference from Apr 3rd-9th at the South Coast Hotel in Las Vegas
FactorySQL team, I’ve had integrator requests to test with the following OPC Servers:
Kepware/Top
Bristols
Citect
Rockwell
Interesting. I’ll be curious to hear how it goes 
Pray to the interoperability gods!