Repositories for Debian:
Lenny/Stable:deb http://www.vollstreckernet.de/debian/ stable amule wx
Squeeze/Testing:deb http://www.vollstreckernet.de/debian/ testing amule wx
Packages, of that repository, are GPG signed, so follow this step as root:
apt-key adv --recv-keys --keyserver wwwkeys.eu.pgp.net D63913EF50D0AE60
For more info, see:
http://wiki.amule.org/index.php/HowTo_Compile_In_Debian#Unofficial_way