Soak test invitations for the Motorola Droid Razr HD have begun to be sent to owners who have been selected to participate in this round of testing. Motorola's website proclaims that this device, along with the Razr Maxx HD and Razr M, will all be upgraded to Android KitKat, though no date is specified as to when the upgrades will begin rolling out. But with soak test invitations being sent, it's a safe bet that there will be some KitKat love for Razr HD owners in the not too distant future.
Update - Reports are coming in that owners of the Razr Maxx, Ultra, and M are receiving soak test invites as well.
Thanks to LivinginKaos and SamuriHL for the tips!