So my current NetWare config:
SERVER-1 is a DA. It has it's slp.cfg file pointing to SERVER-2
SERVER-2 is a DA. It has it's slp.cfg file pointing to SERVER-1

I believe that's how it should be (the two da's point to each other, not themselves).

Do I do the same with OpenSLP on OES?

In other words, the
net.slp.DAAddresses =
line should only have the "other" DA and so on?

Also, in the process of upgrading, if SERVER-1 is NetWare and SERVER-2 is now OES, is that still the case?

(have them point to each other?)