Yesterday, the latest Suhosin extension for PHP (version 0.9.29) was packaged and uploaded to Unstable. I built the extension to work with the PHP 5.3 backport for Lenny, that is available from this repository in lenny-experimental, so you can find php5-suhosin (version 0.9.29-1~tzz50+1) there as well.
Packages are available for i386 and amd64.
