JFN (Jabber Feed Notifier) is a Jabber client/component that send notifications of new feeds entries. You can configure it to send you only notifications, summary message or full message, and more. In addition, you can send your OPML file.
py_xdb_auth is a small but robust jabber-component based on twisted to authenticate jabber users against ldap. It is written for jabberd 1.4 and based on twisted and python-ldap.