I recenty located the source code for the Samsung Galaxy S2 SGH-S959G available from Straight Talk. I thought I would post it for anyone else trying to find it. It's available at http://opensource.samsung.com/reception/receptionSub.do?method=search
. Just scroll down until you find the model number.
I'm not sure how to post a link so i just typed it out ( not a big forum guy). I'm not a developer so I can't really do anything with it, but I know it's needed. I am really looking forward to having root, and CWM available for this phone, and hopefully this helps.
Sorry if this is posted in the wrong place, please feel free to move it if needed.