Adium 1.3b3+ (revision 23993) with libpurple from im.pidgin.cpw.qulogic.msn (revision 5ec131b7963df7614ef71243e12b2b558eb5211f).
+ Applied
http://developer.pidgin.im/ticket/5982 (Needed because I can't compile libpurple framework without this change)
+ Changed NEW_MSN to TRUE (Needed if msnp14/15 is being used instead of msnp9)
+ Changed #include <libpurple/oscar-adium.h> to #include "libpurple_extensions/oscar-adium.h" in SLPurpleCocoaAdapter.m (Needed because I can't build Adium without this change)
This have a new token patch that *should* work but I haven't been able to test that yet since I just built it. If you wanna help test it go ahead but don't blame me, adium devs or pidgin devs if it messes up everything for you. It seems to work for me with no problems so far at least.
!!! UNOFFICIAL BUILD !!!
http://www.mediafire.com/?fn3rubmlxna!!! UNOFFICIAL BUILD !!!
If you think it's worth the risk to download and use this then please enable log to file in the debug window so that you will have a debug log in case something goes wrong and report any bugs you find that are related to msnp15.
Edit: I thought there were something wrong with my old build (revision 23989) but it seems that there is a problem with dep build scripts atm which makes the powerpc part of libmeanwhile framework wrong. This new image should work for powerpc too.
Known issues:
logging in with a @msn.com account doesn't work --- Will probably be fixed in my next build