Hello,
besides existing deb.kamailio.org, I added builds for Debian 5.0, 6.0 and Ubuntu 10.04 to the OpenSUSE Build Service (OBS). These repositories are built only for stable releases in 3.2.x series. Main target for them is to be sure the releases compile properly, across main Linux distributions, OBS providing an easy interface to keep updating and building until everything is ok.
Anyhow, these alternative repositories may be handy to use for some of you. Details about setting APT sources are available at:
http://www.kamailio.org/wiki/packages/debs#using_obs_repository
Cheers, Daniel