Listen. Do you want to hear a secret?

Imagine getting a half million postcards delivered to your mailbox, and every one of them bears a secret, sent anonymously.

That's the life of Frank Warren, the force behind Post Secret. Hear his story on the latest edition of Your Postal Podcast.

Also on this month’s show: A look at how letter carriers deliver in the middle of summer heatwaves, plus details on the new stamps honoring Negro Leagues Baseball.

For a transcript of the program, please click here.

Be sure to catch up on previous shows below. All of the podcasts can also be downloaded free at the iTunes store or via any other RSS feeder. Please click here to share your comments and ideas for future podcasts.

What do you think about Post Secret? Good idea? Why do people feel the need to share their lives? Comment here.

Photos: At home with Post Secret (news.cnet.com)

Behind the scenes with Post Secret (news.cnet.com)