Nice howto! Tried this steps on Debian Etch and got only one problem (and solved it). When following this howto my FTP program said:

"Can't exec "/usr/sbin/pure-ftpd": No such file or directory at /usr/sbin/pure-ftpd-wrapper line 174"

I've edited line 26 in /usr/sbin/pure-ftpd-wrapper and changed the line that points to the executable wich is:

my $daemon = '/usr/sbin/pure-ftpd-mysql';

in stead of the default:

my $daemon = '/usr/sbin/pure-ftpd';

That solved my problem.