Posting MP3's

I have a little mp3 player that records audio (my voice for example.) I am very excited about this since it will allow me to dictate thoughts, descriptions, etc. at times when it might not be convenient to write them out. (This happens alot when I am driving or traveling). If I can figure out a way to post them, then I can 'talk' along with the pictures I post, or create powerpoints (with audio narration) to accompany my experiences in Korea. We'll see if I can make it work. :-)