[H] Sharing MP3 files online

[Veech]

What do you folks recommend as an easy and free way to post MP3 files 
online, which can be opened and  listened to by anyone else?  I'm looking 
for a way where I send a link and other people can click on it and it plays 
automatically in Windows Media Player or whatever.  Yousendit requires that 
you download the file, I just want it to open and play...

thanks..