SpagoBI framework

I also think this can be good to learn from, its a italian j2ee Open Source project SpagoBI - a comprehensive framework with datawarehouse, Jasper reporting, Talend OpenStudio and more

http://spagobi.eng.it/ecm/faces/public/guest/home/solutio...
I know its not web analytics but I think its good for some to know about how they develop this over time...you dont need to invent the wheel again - better to integrate with other good solution that is complementary to yours.