If one has localy multiple Wiki's it can be usefull if you can Interlink between them. You can do this by threating them as an external link, but also by putting extra definitions in all(!) the property files.
e.g.
jspwiki.interWikiRef.wiki_1=http://localhost/wiki_1/wiki.jsp?page=%s
jspwiki.interWikiRef.wiki_2=http://localhost/wiki_2/wiki.jsp?page=%s
Why not implement a feature to do this kind of resolving dynamicaly or (less elegant) static by using an include file apache/conf.d style?

Olaf Zevenboom