Hi, We have just written what I hope will be a productive contribution to the efforts of this group. It's essentially our experiences implementing WS-Transfer and using a publicly-available WS-Eventing, and comparing it to WSRF and WSRF.NET. As we all know, it's a difficult/controversial subject, but we're hoping we can help the community with a concrete implementation and evaluation. Title: Alternative Software Stacks for OGSA-based Grids Abstract: The Open Grid Services Architecture (OGSA) has been a major step forward for Grid Computing, but its de facto reliance on the Web Services Resource Framework (WSRF) and WS-Notification have left some in the community questioning if the Grid software and protocols have become too complex. In this paper, we consider the feasibility of an "alternative" software stack, based on WS-Transfer and WS-Eventing. We compare and evaluate WSRF/WS-Notification vs. WS-Transfer/WS-Eventing, first via a "hello world" service and then via a more complete Grid scenario for remote execution called "Grid-in-a-Box". By qualitatively and quantitatively evaluating each approach, we find that subtle differences exist (e.g., the naming of resources, the creation of resources) but they are overwhelmingly equivalent in their functionality and implied performance. Overall, this paper uniquely shows that there could be alternative software stacks for OGSA-based Grids. Full info: M. Humphrey, G. Wasson, Y. Kiryakov, S-M. Park, D. Del Vecchio, N. Beekwilder, and J. Gray. Alternative Software Stacks for OGSA-based Grids. University of Virginia Department of Computer Science Tech Report CS-2005-06. April 2005. Available: http://www.cs.virginia.edu/~humphrey/papers/AlternativeSoftwareStacksOGSA.pd f We look forward to any comments and discussion! Regards, Marty Marty Humphrey Assistant Professor Department of Computer Science University of Virginia