I don't know if anyone can answer this without breaching the NDA, but.. I understand that you're locked until level 10. Do you choose a class during creation at all? From the most recent letter from YoshiP, I notice his screenshots don't include choosing a class, and the "summary" screen at the end does't list one either--just race, birthday, looks, etc.
The reason I ask is simply that I'm wondering whether it would just be possible to choose a "locked" class during creation. >.>