Hi Glenn,
Ya - I've seen this form done as well and it not at all something seisan is derived from. I just thought the poems combined with the selection of images make an interesting sort of...riff...of the seisan postures.
I also like one of the descriptions I read somewhere on those pages that while they do the form slow and strong each posture represents one in a string of continuous attacks - either with different techniques or the same technique over and over.
I'll also take a peek at the link.
Chris - you might want to take a gander here:
http://www.cyberkwoon.com
It is another board I visit and mostly just lurk on but if you dig around there's lots of good info.
happy training,
Dana