Hi!
I don't start threads often but oh well, I was surfing yesterday and I saw something interesting..
A library that allows playing of these files:
.669, .amf, .ams, .dbm, .dmf, .dsm, .far, .it, .j2b, .mdl, .med, .mod, .mt2, .mtm, .okt, .psm, .ptm, .s3m, .stm, .ult, .umx, .xm Sound files with .wav extension

As you see, ".j2b" is displayed there, but the library seems to be only for Linux and I don't have Linux to try myself:

Page for the library is this: http://sourceforge.net/projects/libmodplug/
but there's no files on it.
Later I found this:
http://sourceforge.net/projects/modplug-xmms/
it seems to be a plugin for a player called "XMMS" which is this one:
http://www.xmms.org/download.php

I don't have Linux so I can't test it, but I bet many of you have Linux, so if somebody could try then it would be nice.

Maybe I missed something.. it's 3:30 AM and I'm sleepy, cyaa.