Once you have created your podcast in Audacity (complete with intro and outro music from a place like Free Music Archive), you must save it as mp3 file.
First, you must download the right encoder (lame_enc.dll) if you haven't already done so. Select the edit menu, go to preferences, select libraries. On the libraries popup menu, click on the "download" button next to "LAME MP3 Library".
Once the encoder is downloaded, select from the file menu "Export". Name the file, and select "mp3" as your file type. You will be warned about the reduction in the file size; click "OK". Fill out as much or as little of the metadata song information as you want, and then click "OK".
Once you have your mp3 file saved, open a browser window to min.us. Click "select" and find your mp3 file and click "open". Voila! You are done. Be sure to write down the unique address in the address bar before you leave the min.us site.