libpurple is included with pidgin and is available @ http://www.pidgin.im
the module has been tested with libpurple 2.5.2 from the same version of pidgin :
http://sourceforge.net/project/downloading.php?groupname=pidgin&filename=pidgin-2.5.4.tar.bz2
 
another point, for MSN, I suggest to install msn-pecan plugin for libpurple :
http://code.google.com/p/msn-pecan/
 
I used version 0.0.16 : http://msn-pecan.googlecode.com/files/msn-pecan-0.0.16.tar.bz2

Eric.
2009/1/29 Henning Westerholt <henning.westerholt@1und1.de>
Hi Eric,

welcome on board. :-) Do you've any pointers about one could get this
libpurple library? I did not found in my package management on a first
glance. And what version do i need?

Cheers,

Henning