This study reports on the feasibilty of developing applications to the WSRP (Web Services for Remote Portlets) standard. It was carried out as part of the GroupLog project by UKOLN, in conjunction with University of Bath Centre for the Development of New Technologies in Learning (CDNTL), and was funded under the JISC 03/04 call for projects to develop E-Learning Tools for learners and teachers. GroupLog is a tool for supporting collaborative group work and facilitating tutor feedback in large cohorts, developed at the University of Bath. The report covers a review of the WSRP standard, includes several links to related resources, and reports on practical implementation experience using RDN Include as a case study.