I have managed to get myself two Google+ accounts.
I created the first when it was in beta, but used a non Gmail address when signing up (I really can't remember why).
I can't add my existing Gmail account to my Google+ account - the only option is to start a new one.
I thought I'd try from the other direction (adding Google+ to my Gmail address) but all that did was create a new Google+ account.
So, now that I've got two Google+ accounts is it possible to merge them? I don't want to abandon the first (I have lots of people in my circles etc.) and while I don't use my Gmail account that much I'd rather not abandon that completely either.