Here are some unofficial Sylpheed builds I made for Debian woody:
sylpheed_1.0.0-1woody_i386.deb: the main package.
gpgme_0.3.16-1woody_i386.deb: gpgme for GnuPG support
gnupg_1.4.0-1woody_i386.deb: GNU Privacy Guard
Signatures can be verified with the command: gpg --verify sylpheed_1.0.0-1woody_i386.deb.sig
My pgp key can be found at http://aferrarini.altervista.org/files/pgp_key.asc.
sylpheed_1.0.0-1woody_i386.deb.sig
gpgme_0.3.16-1woody_i386.deb.sig
gnupg_1.4.0-1woody_i386.deb.sig