The Emplode code hasn't been opensourced. I think you mean the Emtool code - emtool is the Linux command like utility for loading music onto the empeg. There are definitely some parts of that code base that could be used to write a file transfer utility, and some of the comments in the source code are very helpful in this respect. As I understand this should also be no problem over USB. There have been some discussions here on the BBS about it, but as yet no one has produced anything. From the comments I have seen it should actually be reasonably straight forward to do this - download the souce, have a look through and tell us what you think :-)
(list 6284, Mk1 S/N 00299 4GB blue [for sale]. Mk2 S/N 080000094 26GB blue)
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(list 6284, Mk1 S/N 00299 4GB blue [sold]. Mk2 S/N 080000094 20GB blue)