VOIP (SIP) App to be used with Google Voice and Gizmo

[rcicu]

I have Google Voice setup with my Gizmo account (VOIP) to allow me to make and receive unlimited PC to land phone calls. I use X-Lite on my laptop to login to Gizmo.

I have SJphone on my i910 and it works but I think it could be a lot better. I also have tried X-Lite CE but have had no success.

Are there any Omnia friendly SIP applications that anyone else is using? Is it possible to modify the Skype app to play with Gizmo?

Thank you,

-rcicu