There is a new screencast about Topicalizer and how it can be used on a blog called 'Sawfish Mango' (
http://www.sawfishmango.com/), please have a look at
http://www.sawfishmango.com/screencasts/mashup_paper.html for the screencast and
http://sawfishmango.com/?p=19 for the related article.
