The stable version is updated to 2.2.3
deb
http://www.vollstreckernet.de/debian/ stable amule-stable wx upnp
wx is needed for wx-2.8, you can omit it, if you have it already from somewhere else
upnp is needed for libupnp 1.6.6, you can omit it, if you have it already from somewhere else
For both optional parameters is said, if it's not needed anaymore, becuase the official repo includes it, they will just get an empty index. So if you leave them in the sources.list, you'll get the updated versions when they are needed by amule and didn't reach stable.
For sure, you can get the sources for selfcompile the usual way via:
deb-src
http://www.vollstreckernet.de/debian/ stable amule-stable wx upnp
You can combine those two possibilities to get just what you want.
gpg --keyserver wwwkeys.eu.pgp.net --recv-key D63913EF50D0AE60 gpg --export D63913EF50D0AE60 > amule-key apt-key add amule-key
