Hello:
I'm sure many of you already know about this, but for those who don't it's a great tool. I really like to listen to Spanish mp3 podcasts, but sometimes the speed of the speech is a little too fast for me. What you can do is download a free program called Audacity, import the mp3 into the program, and then slow the speech by whatever rate you want...-5%, -10% etc. Plus, you don't lose the pitch of the speakers voices.
I think it's a great tool for language learners.
http://audacity.sourceforge.net/download/windows
P.S. If you download the program, make sure you also download the LAME MP3 Encoder so you can save your edited files in MP3 format.