The current release:

mydns-1.1.0.tar.gz · [MD5] 726,052 bytes 18 Jan 2006
(current release, tar/gzip)
mydns-1.1.0.tar.bz2 · [MD5] 573,261 bytes 18 Jan 2006
(current release, tar/bzip2)
mydns-postgres-1.1.0-1.i386.rpm · [MD5] 1,850,927 bytes 18 Jan 2006
(current release, RPM, Fedora Core 3)
mydns-mysql-1.1.0-1.i386.rpm · [MD5] 3,402,285 bytes 18 Jan 2006
(current release, RPM, Fedora Core 3)

A version history can be viewed in the ChangeLog.

There is an archive of old releases, but they're buggy, so don't use them.