Jabber away

[senji]

I have a service (It's a diplomacy play-by-email Judge) which operates via email. I'd like to add some IM capability as well, and Jabber seems like a fairly good place to start (and probably stop). What I basically need are the following:

• A non-interactive tool for sending Jabber messages, with an interface kind of similar to sendmail(8)/mail(1).
• A non-interactive tool for receiving Jabber messages which can drop each message into a separate file, or pipe them to some programme or email them to a set email address or anything similar like that.

There seem to be quite a few of the former available, but I've failed to find any of the latter. Anyone got any suggestions? I'm loathe to write my own Jabber client implementation!