Hmm, what is the "com.arsdigita.dispatcher.InitializerServlet", sounds like the problem may be in it, or it could be related to the "/WEB-INF/resources/enterprise.init".
The above errors sound like tomcat is having a problem setting up log4 J. Most of the time this has to do with it not finding the Log4J.properties file or what ever file you use to initialize it.
I've got to head out for a meeting in a few minutes. I will probably not be back until late this afternoon
I hate to abandon you like this but, got to pay the bills
I'll check the board when I get back this afternoon though, in case your still having problems.