You can still create an account and provide the Apple reviewers with credentials to try it. This is what we did for an iPad project that uses Facebook photos, we provided Apple with login credentials to a facebook account with lots of photos in it so that they can test it, and the app was approved from the first submission.
Tried that without success. Maybe it depends on the person examinating it. Btw it took them two months to reject the app so there must have been something going on.
