If you're just going to be speaking your podcast presentation it is possible to make the mp3 file size small enough so it appears to stream even for dial-up users using a 56K modem. The above file totals 57KB which is about the size of a small to medium sized webpage. But when you listen to the file it transfers at a rate of 16kps which should be small enough that there isn't any interruption even for slower connections. Unfortunately I don't have a dial-up connection so I can't test it to be sure. If you have a dial-up connection and care to post your comments, they would be most welcomed.

To create this small file size I recorded the file in .wav format using Windows Recorder, and then saved it in MPEG Layer-3 format with the selected attributes of 16kbs, 12,000 Hz Mono 2KB/s. Then once the file was saved, I right clicked on it and renamed the file extension to *.mp3

To get an idea of how to include the code in your blog or webpage, you can find a good tutorial here. Of course I can't guarantee this will work for all blog publishing software, but any that will accept html the way MovableType does, should work fine.