How do I play MP3s from my Dropbox?

I have the [Dropbox](http://dropbox.com) app on my Droid, and it can "download" files to the local storage on the phone, but for some reason, the music player app can't see those files. How do I make the music playing app see the mp3s in my Dropbox? Is there an alternative way I should think about the problem or sync the files?