For my public service announcement, I chose to discuss something near and dear to my heart - blinkers! I used Garageband to create my recording, and added music and sound effects that were already built into the program. After creating my soundtrack, I went to Flickr's Creative Commons and found photographs that fit my subject; then, I inserted the photos into to my recording. Finally, I published my podcast and posted it here.
I found that once I published the podcast to my blog, the pictures were off by just a bit. This resulted in a little empty video space at the end which was not originally part of my design. No matter how I tweaked my original recording and the timing of the pictures, I could quite get it "just so." My husband (who knows much more about these kinds of things than I do) suspects this is because the file sizes of the pictures are different and the final video is influenced by picture size. I'm not sure, but that sounds plausible to me. Anyway, enjoy!