Here it is from Twitter itself:
Log-in issues for users of some mobile clients
Users using certain Twitter clients are unable to Log in.
These clients include
– HTC Peep
– Moto BLUR
– Nokia Twitter apps
– Samsung devices (except for phones running Android OS)
– Huawei phones
We are working to resolve this issue.
Update at 7:30PM: This issue has been resolved.
So it wasn’t OAuth? Any testers? Share your findings please
UPdate: Ok so it seems like a no go…so are they just kicknig us while we’re down?