Here is a report of OGSA-D activity for the last month, as input for tonight's OGSA call. ---- Our f2f meeting in London produced very useful technical discussion. It was especially valuable to have representatives of several major activities present. We have a working draft of the architecture document for discussion at GGF. Work on this document has made significant progress but it still contains many holes. Recently we have begun work on a companion scenarios document; this is needed to show how the elements of the architecture fit together. We have begun work on a memo about security concerns for data services. Our aim is to initiate a dialogue with security teams to make sure that their work addresses our needs. We note that other groups (such as the LSG-RG) also have activity in this area. We have three sessions scheduled for GGF14. One is an outreach session at which we will present our work. The other two are technical sessions, on data transfer and transactions. Telcon minutes are available on the OGSA-D WG GridForge site. ---- Dave Berry Research Manager, National e-Science Centre 15 South College St., Edinburgh Tel: +44 131 6514039