From their website, the focus of OSOA is defined as follows:
The Open SOA Collaboration represents an informal alliance of industryleaders that share a common interest: defining a language-neutralprogramming model that meets the needs of enterprise developers who aredeveloping software that exploits Service Oriented Architecturecharacteristics and benefits. The Collaboration is not a StandardsBody; it is an alliance who wish to innovate rapidly in the developmentof this programming model and to deliver Specifications to thecommunity for implementation. These specifications are made availableto the community on a Royalty Free basis for the creation of compatibleimplementations. When mature, the intent is to hand thesespecifications over to a suitable Standards Body for future shepherding.
A key focus for the collaboration is to continue to drive the evolution and standardization of Service Data Objects (SDO) and Services Component Architecture(SCA). You can read a lot more about their goals and plans by visiting the web page.