Yesterday I added a tour feature to TroopTrack. If you are new to TroopTrack or feeling unfamiliar with it, just go to Support -> Free Tour to get a guided tour.
Also, I am working on a feature to let you turn quick messages into discussions. When it goes live you will be able to choose to have replies sent just to you or to the whole group. If you choose the whole group, replies will go to everyone on the original email and they will show up in a thread on the recent messages list. I'm hoping that feature will go live soon, but it's going to require a more extensive code review than normal new features and it may be a while.