In my role as pseudo general counsel at Alfresco, I wade through a lot of contracts. As part of this, I'm constantly trying to find the right balance between the needs of our customers and partners in different geographies. Interestingly, our European and North American customers view licensing very, very differently. Generally speaking, our European customers want our software under an open-source license (GPLv2). North Americans? They want the benefits of open source without the obligations and perceived risk (meaning, they prefer a dual-license approach that allows them to contribute back modifications if they wish, but not out of duty).