I am having a hell of a time adding songs to my 3GS from multiple computers which, from what I read, isn't a possibility for the iPhone (was never a problem on the iPod). Anyone know of anything that would work for the 3GS? or any 3.0 firmwared device? Sharepod doesn't work, DoubleTwist doesn't work. I can't seem to find anything that works or even any conversations about it. Thoughts? Comments?