One thing that has been annoying as I listen to the seminars is that a lot of the presenters have given temperatures in degrees Celsius without providing the corresponding temperature in Farenheit. Since this is the American Homebrewers Association, I think the majority of us use *F in our day-to-day processes. I know that I've missed some useful information listening to these talks simply because when a speaker mentions something like 70C for a mash temp I can't really relate it to anything. Providing the appropriate conversions would definitely help engage the audience a bit better.