Hi,
I've recently significantly improved the automated Dovecot Debian package builder. At the beginning it only produced i386 binaries for Debian testing. A few weeks back I added a slave builder that builds packages for Debian stable. Today I have extended the slave builder with support for multiple architectures and I've added amd64 binaries to the repository. The master builder still builds packages for testing/i386 every hour. The slaves check for new source packages about 20 minutes later.
Read the following wiki page for more information and read it carefully when you are considering to use these packages:
http://wiki.dovecot.org/PrebuiltBinaries#Automatically_Built_Packages
Also, every day at four 'o clock in the morning, the latest source packages are uploaded to the openSUSE build service, which builds i386/amd64 binaries for several Ubuntu versions (experimental):
http://download.opensuse.org/repositories/home:/sbosch:/
Regards,
Stephan.