This has been an ongoing request. Right now, there's no plans publicly stated about support for it. However, there is already an issue in the feedback tracker about developing it.
3DConnexion SupportMy suggestion would be to go over to the issue in the feedback tracker and vote for it as a needed feature. I have discovered that the developers are in fact looking at issues in the tracker --I got a response the other day on my request for Morph sliders in iClone --which I've been told now that it's coming in iClone 7. My advice to you is to vote and get the word out to other people to vote on the issue if you want to get it on the development calendar.