It does work. I used it for about 2 months now. I did have probs using php5 though. Not with ISPConfig, with a lot of CMSs (I posted this on Tips).
I gave hxxxxx as host, and serverkompetenz.net as servername. I also had to add apt-get install postfix, zlib, zlib-devel to get it to install on SuSe 9.3
I login on https://hxxxx.serverkompetenz.net:81
with no problems.