Username.
Full Name
Addres
SQ/SA
Just call to blizzard, say you lost your e-mail (or somebody hacked it, invent something) and they will ask you for your name or adress or cd-key, but you can say you lost the CD-key. So you just say them the adress/full name(depends what they ask) and tada!
There are threads who show how the conversation go, look for them![]()