I spoke to Donna Maurer on the topic of card sorting. I think she has a very nice and practical approach to card sorting.

Donna referred to the OzIA conference (http://www.oz-ia.org/2006/) which takes place on September 30 and October 1 2006 in sunny Sydney.

You should also check out Donna's blog (http://maadmob.net/donna/blog/) if you're interested in Information Architecture.

You can also keep up with news on Donna's forthcoming book on card-sorting (http://www.rosenfeldmedia.com/books/cardsorting/).