For taking care of the "E-911" issues regarding VoIP. We're not there yet though.
I'd like to see GPS with APRS for relaying positioning information to an internal APRS server running on the BCWARN network. This also allows anyone on the network to see where a grab-n-go kit is setup. Having a small APRS plus GPS unit also gives the ability to send short messages via the APRS network. This could come in handy while setting up a kit, for example "Send extra coax cable to my location" or something along those lines.
I'm sure there is some APRS+GPS mini form factor units out there on the market, I'm not sure of any specific models though.....
http://www.byonics.com/tinytrak/gps.php
http://www.winlink.org/Aprslink.htm
This functionality was instated only a month or two ago and could be very invaluable for our members out in the field with TH-D7's and TM-D700's.