HMmmmmmm... good luck with integrating it with ARI, I don't believe that will happen for a long time (if it does). I feel FreePBX's expanding of Little John's ARI is completely out of neccessity for exposing some new features... no real motiviation to take it over. It is very much the same interface today as it was 3 years ago (same with FOP). Perhaps one day they will, but not atm.
I think the best we can hope for is it's integration into FreePBX itself. They take complete control there and I think would be more comfortable doing it. Perhaps after it's in FreePBX they'd look into ARI, maybe (e.g. FollowMe).
I think they're more likely to redesign a completely new user interface into FreePBX than continue with ARI, but that's just my opinion.
P.S.
I know some people *do* use the pager notification (specifically for cell phones), but I don't myself.