Open the menu. Click VIP Account. On the bottom it should say Revoke Access. If you click revoke access, it disallows any other accounts to use your VIP account besides the one you are on. So, if you revoke access on your new iPod, the old iPod (and any other device) will not be able to use the account. However, when your VIP runs out, you will be able to use the account strictly on that device, because it becomes a regular account.

Let me know how things turn out!