Hi Damian. Although WAE is released, it's being supported via Cisco SEs at specific customers. Best thing to do is reach out to your local Cisco SE at this point.
In answer to your second question, WAE supports standard protocols like OSFP, IS-IS, RSVP-TE, PCEP, BGP-LS and others. It can work in multi-vendor environments, and isn't so much device-specific as protocol-specific.