Hello Jelmer,
Isso is still a bit of a moving target as new versions are being released frequently and its design is not stable yet.
The current packaging work is on:
http://anonscm.debian.org/gitweb/?p=collab-maint/isso.git;a=summary
I'm planning to release a first version (maybe to experimental?) shortly.
Comaintaining, package sponsorship, suggestions or patches to the packaging would be very welcome.
--
Federico