WSO2 is well-known for its SOA enabling middle-ware stack. They are the only product vendor to have middle-ware stack based on a component based model (based on OSGI framework). Now they have move their products in to the cloud, enabling the users to make use of already set-up platform as a service. The best part is, all these products are open-source (Apache 2.0 license)
WSO2 organized their first ever con, today(14&15 September 2010). This is one among many events they have organized to celebrate their 5 th birthday. It was full of speeches/discussions from the pioneers in XML/web-services, such as James Clark. In summary, the conference was a great success & I'm looking forward to next years conference as well.