Hey Tabby,
Sorry I am late to the discussion. I take flaxseed oil because it helps to coat the stool to help it slide out. I havne't done the flaxseed itself but I remember Buttgirl telling me she made a tea out of it and it really seemed to help in passing her stool. I think they need to be ground to get any of the essential fatty acids out but whole they probably just add some bulk.
I wonder if wheat germ would do the same.
Yeah, the psyllium powders have to be downed fast or they turn into this gelatinous paste (as you have found) and are quite difficult to choke down. I do take some psyllium from time to time if I don't get enough fiber in my diet but mostly rely on glucomannon because it doesn't make it bulky or scratchy.