I read The Helpful Stranger and Secrets.
Two good sources for mystery podcasts are The Podcast Page at Alfred Hitchcock's Mystery Magazine which recently posted my podcast of Madame Selina and The Ellery Queen site, which offers a professional podcast of my EQMM story,The Star of the Silver Screen.
SleuthSayers blogs on mystery fiction by a lot of the old Criminal Brief gang and lots of talented new writers. I show up occasionally
Mystery Writers of America
Sisters in Crime
International Association of Crime Writers