For those interested I have done a review of Allen Pittman's Bagua DVD's.
good review. this dvd is expensive but his xingyi staff one is just $10. and i read some of walking the i ching. i personally think that he [usually] is a much better writer than any other neijia teacher[apart from tim of course]. the introduction to walking the i ching is especially elegant and also his article in the old edition of 'neijiaquan'ed. jess obrien. was the highlight of that book for me [though the book is excellent generally].