I'm personally going to go with 5 B.Net accounts, with one wow per account.

I'll lose the new features, like drop down boxes for account management.
Basically the game will continue to run as it always has up until now.

I'll also be able to log all 5 in at once, without issues.

Just need to create a few email addresses for the B.Net accounts.
I believe I get 10 email addresses from my internet provider.
But even gmail, hotmail, yahoo accounts etc, would work just fine.