We actually haven't talked about it internally yet, but I've had ideas about that. Few things I'm considering.
First, the bug tracker we're using needs to be moved since it's the only thing left on that server, and it could live elsewhere to consolidate resources and free that up for other usage.
I personally want a public facing roadmap/board with bugs and features listed (with the ability to keep certain ones privately visible only to members of course) and I might like to see a voting feature or one to add notes, upload files maybe, also available only for members.
To do a private/subscriber only board like this won't be difficult, and we don't have a ton of stuff in our newly created bugtracker database to migrate (yet) so I feel like the sooner we investigate and move to a system capable of doing these things, the better (for the work involved in migration.)
The main issue is that it just isn't feasible to add all existing d7II subscribers to any type of private access via a member's area, since that would require a lot of manual effort to implement with existing subscription data. It is worth investigating some way of possibly importing the d7II accounts into a database but not sure about that and obviously depends on the system. This will most likely be done through the membership plugin on foolishit.com being used for dMZ subscribers (adding a new subscription level for all d7II subscribers allowing access only to this bugtracker type content.) It may just be that we plug it into new d7II subscriptions to assign access automatically, and just have existing d7II subscribers personally request access, via a d7II in-software submission or something, and we do it manually on a per-request basis for those interested parties.
I am looking at possibly using Trello for the actual tracker, but need to check more into it to see if it will fit our needs, especially with private access levels to interface with board items.