FWIW: From this it looks like there is a new, sellable mount that is treated like a TCG mount. Not sure yet whether it is BOE or not since I haven't seen it.
After you purchase the Heart of the Aspects, you'll receive a code that can then be redeemed on any North American World of Warcraft license via Battle.net Account Management. North American licenses include realms serving players in United States, Canada, Latin America, Australia, and New Zealand. This mount code can be emailed to a friend as a gift, or -- if you would rather redeem the mount code yourself -- automatically filled in for you in Battle.net Account Management.