If we are speaking about the EX or DL series and z-wave and z-way there won’t be much websites talking or discussing this. I am active in the siio.de blog that has a nice forum for z-wave but it is a german site. There is the zwave.de (i think it is from the developers) which is german to. The forum there is not that active. The rest is all about the WD Community. I try it here because i hope the wd developers read it and maybe adapt some things to the NAS system.
At the moment we are (EX series) on 2.11.133 and Z-Way 2.20. The Z-Way app needs really more developing because it is not user friendly at all. I am a technician and really a geek with these things but a “pro” sumer has really no fun with that.