DialCentral is a Google Voice client and operates like the website. On the GV website you need to specify what phone you will make the call on. The same is true for DC.
I don't mean to hijack the thread, but DialCentral + Gizmo5 works great for making and receiving free calls over Wifi or 3G, if you're lucky enough to have a Gizmo5 account (or other SIP provider?) before the Google Voice/Gizmo5 takeover.
You can use a Gizmo5/SIP number as one of your forwarding phones in Google Voice (to receive calls)... and then use your Gizmo5/SIP number as the callback number with Google Voice/DialCentral to initiate SIP calls (over Wifi or 3G).
Works great with DialCentral and the built-in SIP support on the n810 (or n8x0?) and n900.
(Search the forum here for SIP configuration details)
And continued thanks to epage for DialCentral development
The latest DC updates (1.2.18) have been looking real nice.
Thanks for keeping us Diablo folks in the loop!
Just as an FYI I have confirmed Adisons texting bug in 1.2.19. It is possible to get a quick fix out but I think I'll spend the time to try in the same vein 1.2.19 was suppose to be, trying to get rid of the graphical glitches in Qt on n900.