You will notice that the current GroupWise roadmap at www.novell.com/.../ ends with next year's Windermere release in early 2013. That release includes two enormous features that will be soaking up all available engineering time: Active Directory support and the new management interface (along with its API). Either one of those is a huge undertaking, and they have to be done right, so I would not expect to see additional Mac support in that release.
My speculation would be that Mac news will come whenever the roadmap is next updated -- at the latest, Brainshare 2013 when the current roadmap is coming to a close, Windermere is shipping (or close to it), and major announcements will improve publicity.
However, I think we can see which way the wind is blowing: OES just licensed Kanaka for Mac as its official "client", ZENWorks 11.2 added Mac support (so 2 of 3 major Novell products have included Mac support), and every GroupWise piece includes iOS support as part of its roadmap. The GroupWise team may not know exactly what its Mac story is going to be, but I bet they are close to having one if not already in-development.
I am on a Mac in a GroupWise 8 environment, and I am using WebAccess exclusively at this point, so I share your pain. Nonetheless, I suspect we are close to resolution.