At the risk of tooting my own horn (a, what the heck--what's wrong with that?) if you're interested in Rogers you may be interested in my articles on him and the use and abuse of Rogerian rhetoric. They're on my hoem page at http://www.ucalgary.ca/~dabrent Rick Coe has also published fairly recently on Rogerian rhetoric in Nathaniel Teich's collection _Perspectives on Rogerian Rhetoric_. The essense of RR hasn't changed since the 70's but a lot of commentary has clustered around it in 25 years. Doug