There are two podcasts at Litopia - the Litopia Daily (a brief podcast with writing news) and Litopia After Dark (a weekly roundtable discussion of writing and publishing).
Mur Lafferty is a self-described "would-be writer" - although she now is published. The ISBW blog, and regular podcasts cover the ins-and-outs of writing. Podcasts are available via RSS or Itunes.
Writing Excuses podcast features three writers (Brandon Sanderson , Howard Tayler, and Dan Wells) talking about their various writing challenges, either amongst themselves or with guest interviewees. They now have a CD out also.
Performancing's podcast on Blogging - informational ideas for writers with blogs, and of course - particularly useful if you are a professional blogger.
Authors and readers get together at this social networking site which gives authors the chance to create webpages. Blogs, video-casts, podcasts etc created by authors here.