By any chance did you name your SIP/Gizmo account "Grand Central (GC)"? If so you are calling out through gizmo and not grand central. The problem there is that Gizmo charges for outgoing ( although every account comes with a free credit ) and this dialer should invoke the free callback calling.
They're maemo and MeeGo... "Meamo!" sounds like what Zorro would say to catherine zeta jones... after she slaps him for looking at her dirtily...