Russ Harris (from Australia) responded to a query about handouts that could be shared with the ACT community by volunteering a couple handouts that he uses in his workshops (see below). After looking at them, I find them to be a very valuable and practical aid for ACT therapists. If you want to talk to him about them, his contact info is described in the handouts.
Update by Russ Harris on April 22, 2008:
Thanks for posting my worksheets up, Jason. I regularly update them, and I'll send some them to you as I do so. Just a note: the extracts from 'The Happiness Trap' in these handouts are from the Australian version. It has been significantly rewritten for the USA version. If you don't already know about it, 'The Happiness Trap' is unique amongst ACT books in that it is the only one that has been written for EVERYONE - therapists, coaches, housewives and astronauts, regardless of whether or not they have ‘mental health issues’ - which also explains ACT in a simple, easy-to-understand manner, without any technical language, or a battery of worksheets and inventories. You can find out more at http://www.thehappinesstrap.com. It is increasingly used as a resource by both therapists and coaches - not only to use with their clients, but also as a way of learning the theory and techniques of ACT in a simple, clear and entertaining manner. (And its ultra-low cost also helps: only $10.50 via www.amazon.com)