(this is a blog, not a podcast)
Platial News and Neogeography:
Platial.com is a social mapping website. Starting with something like QuickMap.com or Flagr.com, but with del.icio.us or Yelp.com social bookmarking and commenting. You can create maps to bookmark your favorite restaurants or restaurants that you want to try out this weekend. And you can create social maps that people contribute to, like this one where people indicate where they were on September 11, 2001:
The makers of Platial refer to their website as Neogeography, which they define as:
"a diverse set of practices that operate outside, or alongside, or in the manner of, the practices of professional geographers. Rather than making claims on scientific standards, methodologies of neogeography tend toward the intuitive, expressive, personal, absurd, and/or artistic, but may just be idiosyncratic applications of 'real' geographic techniques."
For more on neogeography, click here.
There is also a "mini-mapper" Firefox plug-in that works with the Platial website. This, and other mapping and Platial topics can be found on the Platial blog.
I personally did not find it the easiest site to navigate and search, it was a bit frustrating at times. And there is a quote on the front page from National Geographic Magazine stating that Platial combines mapping and blogging. I am so sure how accurate that statement is -- I guess it depends on how you define "blog". Despite that, I think it is a worthwhile site that people who like to think spatially could organize their notes around.