DotDeb.org has released MySQL 4.1.8 packages for Debian GNU/Linux 3.0
Mysql 4.1.8 has been released a few days ago and is now available on dotdeb.org.Here the apt source:
The packages are backports from debian/unstable and have then adopted a new naming convention : they-re now suffixed by -4.1.
Then, to upgrade from 4.1.7 to 4.1.8, you have to uninstall the former mysql-server package and install mysql-server-4.1. A script can detect that data are present in /var/lib/mysql and won't delete them. I advise you to make some backup anyway.
This new naming method allow to maintain the both 4.0 and 4.1 without conflict between the server or libmysqlclient packages.
I hope this will help you to admin your servers easily.
deb http://packages.dotdeb.org ./