Currently the answer is no since we are using podcast_proxy.php which has to be used when you use external xml feeds however it is something that can be possibly maybe a switch could be added in the code to load another player that does one song.
Again though I would need to look at how wimpy handles external files but I beleive wimpy.php itself can play the external file no need for a proxy script as in the XML. I don't think it should take nothing more than a call to get the extention on the end of the link and if it is xml load that player and if mp3 load this player
Any custom quotes you can email to me as Michael does not handle that end of things. In that respect as he said I am the go to guy.