Packages are available from Joyent for both salt-master and salt-minion (packaged together as simply 'salt').
Service manifests are not provided.
Salt comes preconfigured with 'loghost' for a hostname.
Not including the configuration steps you'll need to take, this is the procedure.
Install on server or on client:
pkgin -y install salt
Start the server:
Fix the minion_id on the client:
echo `hostname` > /opt/local/etc/salt/minion_id
Start the client:
Accept the client's key on the server:
salt-key -L salt-key -A
When configuring the server, use cryptpass to generate the password: