Having authentication issues myself, I tried resetting the password here but I guess I can't since I apparently created my account through google. ><
I tried changing my google password, but even that hasn't helped.
I also had the same SMS authentication issues as OP. Hope I haven't dug more of a hole.
Unfortunately I won't be able to try again for a few hours as its off to work! Any assistance would be appreciated.
EDIT: Got it working!! W00t.