The third issue of Podcast User Magazine can be downloaded here.
The blog can be found here. For a completely free magazine about poidcasting there really isn't anything better....in fact, there isn't anything at all, because this is the only magazine devoted to podcasting.
I cannot tell you how many man hours go into writing, editing, publishing, laying out - but it's a great deal.
If you've not read the mag before, slap yourself hard on the back of the head and download it as soon as you possibly can. Great reviews, news, articles. A fabulous piece entirely gratis. How do they do that?!