cat /etc/apt/sources.list
deb http://osm.komzpa.net/~mdupont/osm/ gjergi-osm main

you can get the jars (plugins untested ) here http://osm.komzpa.net/~mdupont/osm/jars/

I run it in ubuntu like this
cat ~/josm.sh
/usr/lib/jvm/java-6-sun-1.6.0.14/bin/java -Xmx256M -jar /usr/share/josm/josm.jar

let me know if you have any questions