Remember the good ol’ days, when the only maps you had were pieces of paper? The past is now!
Up for trying it out? You’ll need to download a nightly build of trunk and add a few files to it. I have written up step-by-step instructions for anyone interested. If you have any feedback, please chime in on the GeoServer developers mailing list.
EDIT: The print module instructions have been updated for GeoServer .2.0.x. Please refer to http://docs.geoserver.org/stable/en/user/community/printing/ instead of the old wiki page.