Blackhawk has ported the EZXMMS WINAMP player to work on the A1200.
INSTRUCTIONS :
1.Install Exmms.pkg
2. copy the update
UPDATE 3 : Update for auto detection of output (no need to select from options)
I'v uploaded both the pkg and the upadate on mfc
UPDATE 2 : THE OFFICIAL PKG BY BLACK HAWK
This version works in full screen.
link : http://rapidshare.com/files/61483583...-a1200.pkg.zip UPDATE : hey.. its working on headsets 
Instructions:
1. download Exmms(qtproxy) ,Exmms v 1.0
2. Unrar both files. copy the qtproxy folder onto your memory card.
3 copy the updated folders inside qtproxy (overwrite the old files)
4 Run exmms.lin
5 select play audio through headset in the config option (top left of the player)
RAPIDSHARE Mirror :
http://rapidshare.com/files/54495766/qtproxy.rar
(I have updated the sources in this mirror file so you can skip step 2,3 if you use this)
(you can also run tictac.lin / hello world.lin)
the guyz at ccmove made a pkg out of the blakhawk's player..
(DOES NOT WORK ON HEADPHONES YET)
here it is..