Yeah, so is there anyone on these forums who don't have a Battle.net Account yet? And who's going to create one just for Diablo 3?
ME ME ME ME ME!!
Still have to come up with a cool user name...
PS. Newb question: I noticed when you try to create an account, it doesn't ask for your username/your unique b.net username (not talking about your email)...do you add this unique b.net username after creating your account or when you start playing a Blizz game on b.net?
There is no Battle.net username, your "username" is your e-mail address.
For display names in character, profiles, etc.
Nothing is certain for Diablo 3, but how it is now is that you choose your name on the forum, this is likely subject to change to something a little more similar to SC2.
it will most likely change to like wow, not sc2. where you post using one of your characters (of which you can switch) (where sc2 you post as your one sc2 account name).
But as FISKER_Q just said, the only thing you put in your b.net is your email, which you use to login with, and for people to add you to real-id friends. Has nothing to do with what people will see ingame (which would be your character names)