Recently installed debian lenny on two machines. after using ubuntu much time, debian comes a bit stranger. Correct repos need to be enabled. Everything not as easy as in ubuntu. But debian does its job better.Anyway, the first problem is with pidgin.Pidgin doesnt have MSN support if you install it from the standart repos. After some search I understood that one needs to install it from debian-backports repo by this
apt-get -t lenny-backports install pidgin.
The second one is about freenx. There is some info about this at net. Some non-official repos gives freenx binaries which I didnt want to try. Instead I used ubuntu freenx ppa team's official repo for this. Here is the repos for freenx
deb http://ppa.launchpad.net/freenx-team/ppa/ubuntu intrepid main
deb-src http://ppa.launchpad.net/freenx-team/ppa/ubuntu intrepid main.
Easily installed freenx from these and voila.