Re: 14 jo kata
At Hanna. There´s the 6 kata, thats also often used as a paired awase-excercise. Both practitioners mirroring each other.
The 6-step kata is actually a part of the 31-kata( step 13-18.). You can also speed it up and doing it in 5,4,3,2 or just 1 step.
At John Seavitt: I recall that Prof. P Goldsbury wrote a series of blogs over at Aikidojournal.com regarding kata, and it seems that learning by kata is something that permeates trough japanese society, not only koryu bugei but also karaoke is learned by kata practice.