The SOA Innovation Lab investigates the use of standard software packages in a service-oriented context. As a part of this investigation the SOA capabilities of products from different vendors need to be evaluated. For this purpose a SOA architecture maturity framework has been developed, leveraging and extending CMMI and TOGAF, as well as other state-of-the art frameworks and methods. Besides details about our framework, we present and analyze first results from the assessment of various vendor platforms.