Built my Java module and got it working on the test Tomcat stack on Greg's machine. As usual, the eXist documentation was slightly wrong, adding overhead to the existing pain. For the record, this is what works when you're importing the Java module in XQuery:

import module namespace su="http://hcmc.uvic.ca/namespaces/xqsearchparser" at "java:ca.uvic.hcmc.xqsearchutils.SearchParserModule";

The next thing to try is turning off Java binding in the config file. If it still works with binding turned off, then we have no security issue, and I can then try putting my module into the existing Cocoon setup on Lettuce; that would let me test and get the TOC page working for teiJournal while we're still waiting for it to get its own Tomcat stack.