Just installed last SVN version of ISPConfig on Debian Lenny RC1. Everything went fine! Great job!
Only two notes: There are already higher versions of MyDNS so everyone installing ISPConfig (using the manual) may check the latest available version first (at the moment mydns-18.104.22.168.tar.gz).
The second note: libsasl2 should be probably replaced by the libsasl2-2 while executing "apt-get install..." otherwise it's complaining about the version.
At the moment have one problem. When adding DNS Zone the form is complaining about email format (Error: Email format invalid) and as an example it shows:
"e.g. webmaster.domain.tld" which is probably a mistake. Doesn't accept firstname.lastname@example.org
In the "Wizard mode" it does accept!