I suggest that the Community Name be a field within the normal Pandora Account that a user can set for a session, until they reset, or leave blank and have it be set as "UserName[nnn] portion of the UserName@eMailAddress.
I think of myself as having my UserName as my eMail address, and am appreciative that when I use the Community it may be somewhat hidden. On the other hand, I'd prefer that I be allowed to login to the Community and then have a Pseud name generated that if I wanted, could be changed.
So I was bothered when I started seeing if the Community was useful, that I could not login as a Pandora user, and that there was no place that I could set my Community alias.
