Check out this link, it's to a post someone did a while ago. I went to the web site and checked out Holistic Horizons and I'm considering doing it now. Though I've had trouble with Psyllium in the past clogging me up instead of making me go, so I'm on the fence about it. I know I need to cleanse, but I'm not sure psyllium is the way to go for me.
BTW, someone else posted this link a couple of days ago. I take no responsibility for finding it. :)