I work in the UK for Logica (was LogicaCMG). We've been using jspwiki for three years now on several intranet sites for knowledge sharing between "virtual" development teams when they are located in different offices around the world. We particularly like the template pages, the templates themselves, and the lack of reliance on a persistence layer based on a database, all of which mean that a wiki can be up and running in fifteen minutes or less.