I lead a small web team in Milwaukee, Wisconsin (USA), where we've been using NetBeans since 2001. We've used it to build sites for salesman order entry, supply chain, and several successful e-commerce sites, as well as a number of GUI programs used internally.
I was a member of the NetCAT (community acceptance testing) team for the 3.6, 4.0, 4.1, and 5.0 releases of NetBeans.