Recently while visiting Slof's hive to grab her Skyrim horses found Oblivion Slof Horses Pack 2 with Zorses, heavy horses and what not...
These are not the extra horses, these are not Slof's horses version 2. These are new. Only modders resource, meaning you can ride them and fasttravel from Hawkshaven (the village you have in testing hall)
She herself says they are for other modders to use.

1. Q; Has this been integrated in MMM already?
2. Q: If not, will it be integrated in future?

A question for the MMM thread, perhaps?