[marcmac]

Did you grab the server.xml that we shipped, and the jar files referenced in the ZimbraServer/docs/INSTALL.txt?

copy ZimbraServer/conf/tomcat-5.5/server.xml to {tomcat-install}/conf/
copy ZimbraServer/conf/tomcat-5.5/tomcat-users.xml {tomcat-install/conf/

The server.xml file is configured to use port 7070 by
default. Production would of course use 80, and we'll also need to
configure SSL

The ZimbraServer/build.xml relies on a zimbra/zimbra user in the
tomcat-users.xml file to deploy

IMPORTANT: Copy the files mail.jar, activation.jar and zimbraos.jar
from \ZimbraServer\jars to your \common\lib.

Copy \opt\zimbra\tomcat\conf\keystore to the conf directory of your
Tomcat installation directory if it is not in \opt\zimbra\tomcat.

On Linux startup with:
$ JAVA_HOME={java-home} {tomcat-install}/bin/startup.sh