does Orion support any type of performance monitoring for SAN - beyond interfaces?
It depends on what the SAN publishes in its MIBs. If it exposes performance data, NPM can poll it. In 8.x, it couldn't poll data stored in a MIB table, but in 9.0, it will be able to do that.
Will Orion 9.0 offer an API into EMC's Navisphere MIB tables?
Could the Universal Poller perhaps handle this?
If the MIBs are standard SNMP tables, the UnDP should work.