Mighty quiet here on the Iray forum.
No. There’s never been much activity here, there is an official support forum elsewhere. There have been a couple updates recently with improvements to V6 support.
And now is dead? aaa it is not : Iray for Rhino 1.5 build 404 Released
Yeah they’re updating it with the newer iRay builds, though not seemingly working on much in terms of the plugin itself.