in Planet OpenSource Debian Backports Packaging ~ read.

recent eGroupware for debian

Since one week eGroupware 1.4RC1 is available. Peter did upload it into experimental and I did repackage it for etch, for a smarty integration (dpkg -i for > 15 packages sucks).
You can download it by using the following line in sources.list:

deb ftp://ftp.cyconet.org/debian etch-backports main non-free contrib

Please note that you also need installed egroupware-egw-pear.
If you experience troubles, report your bugs upstream.