Using it at Gentleware AG - http://www.gentleware.com - for product development (Poseidon For UML) --JanTietjens?
Using it at Communitel Fonocom, an internet company http://www.fonocom.es in Barcelona, Catalonia.
I use it everywhere, for all the projects that I work on. My standard Java project template has the CruiseControl configuration included. -- RobertWatkins.