#7 - June 9, 2009, 4:22 a.m.
There is no deleting Battle.net accounts at this time, Secundum.
Using deductive reason however, everything has become clear; quite elementary really.
The Battle.net account which is using the e-mail you want just needs to be changed over to a 3rd, transitionary e-mail. This will then free up the e-mail address you would like to use for change on your Battle.net account with all your legacy titles :-D
If you are a bit unsure about how to go about it our phone Billing representatives would be more than happy to help walk you through it. It is an odd solution but it will help get you what you want and then we can both be happy!
*party hats for everyone*