Ximian is working on a command-line version of Red Carpet, called (appropriately) rc. It has a back-end process, rcd, which runs as a daemon, periodically querying for new packages and such, and listening for client requests. rc is the client app, which can either run against a local instance or against a remote one, if the remote rcd is set to accept remote connections. It's available in a new Red Carpet channel, rcd snapshots, and so far, it looks awesome.
Man, this is super badassness for admins... it's like apt-get, but better, and cross-platform. Woo.