Comment on this news article
Ask the iTunes Guy: Smart playlists - Macworld (blog)
http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNFUiXnVH_aXTSCZ34YOM6dIAwdJfQ&url=http://www.macworld.com/article/1167276/ask_the_itunes_guy_smart_playlists.html