Had a look for what could be found in the first 2 directories.
In the end I went back to my favourite one which is Point England School. They are up to episode 195 in their book reviews which they have been doing for 3 years. This could be useful for adult viewers/library users too but probably not worth their while by the time they've downloaded itunes and quicktime - just as easy for them to read a review on a website. It may appeal to teens though because of the enhanced visuals.
While browsing that one I found another Auckland school Glenbrae had also set up podcasts - one on the subject of Preserving Culture was very well done so I will be able to preserve the link to that as well.
I am working on getting them linked to my Netvibes setup. Bloglines didn't seem to want me! So, still learning but am on the whole attracted to them and want to learn how to set them up.