Hour Two MP3 audio posted here. Interview starts around the 11 min. mark and ends around 18 min.
Morrow sounds like a kook mudslinger. He had no names and no specifics (ex of an ex, escort or her friend, etc.), but said rumors exist claiming "Rick Perry and his entourage" use escorts, attend strip clubs, engage in group sex with women, said Perry gets "too coked up" to perform and mentioned gay rumors too. Roger challenged him saying the Texas press had investigated and found nothing.
Robert Morrow is a known quantity and there is a lot of him.
http://arkansaswatch.blogspot.com/2011/06/perry-letter.html
http://changeaustin.org/archive/the-blog/