Omni-TS recently announced a beta program for their solution that integrates GroupWise into an Active Directory environment. Think of it a little bit like a Novell IDM solution, but one that is wholly focused on GroupWise. It can either import users into an AD infrastructure, or link an existing eDir account to an existing AD one. It allows users to authenticate against AD but, maybe more importantly, it allows administrators to manage their users from a single point.
Omni are looking for beta customers so, if you are interested, visit this page for more information and details on how to sign up. You will find on-demand presentations and a more detailed description of the offering there too.