The following feature requests are just some things that have crossed my mind and I wanted to make a note of them here:
-Asterisk support for bluetooth trunks so our mobile phones can be integrated into the system. I believe later versions of asterisk support this already.
-Ability to use orbiters as phone devices. I actually feel that the orbiter should be able to do everything an MD can except playback video, I do think they should be able to playback audio as well since they are typically lightweight devices and while they wouldn't make great radio's, would serve their purpose well enough for things like talking to the intruder in your house.
-Plug and Play support for PSTN lines like VOIP lines already have. I am running a Sipura currently and while the setup was not too difficult following JonDecker's guide, there is quite a bit of hacking around involved. Thanks for the guide JonDecker.