We've used CruiseControl for quite some time. Are there any advantages to switching to something like Luntbuild or Anthill? Do they integrate nicely with Clover?
Just a few months ago I would have told you that AntHill provides benefits in two ways: a supporting company and a web administration front end. However, CruiseControl (with its Enterprise offering) is moving in this direction with its recent 2.7 release which provides some web administration capability and its ThoughtWorks backing. AntHill provides support for project dependencies, a more robust web administration capability, user groups, and more support for extending beyond the development lifecycle.
As for a comparison of *open source" CI servers, see my article at
http://www-128.ibm.com/developerworks/java/library/j-ap09056/
Co-author of <a href="http://www.amazon.com/gp/product/0321336380/" target="_blank" rel="nofollow">Continuous Integration: Improving Software Quality and Reducing Risk </a> <br />(Addison-Wesley Martin Fowler Signature Series, 2007). Companion website for the book is <a href="http://www.integratebutton.com/" target="_blank" rel="nofollow">IntegrateButton.com</a>