In Microsoft we founded a LOB Practice team a few years back. The first focus of the team was SAP. Hence we hired industry talent out of the SAP space to build the team. People who were running SAP Basis teams or who worked as Enterprise Platform architects in SAP customers or partners of SAP joined Microsoft in order to form the team. The team still exists today with people around the globe working with customers on design of their SAP landscapes. Lately the team started an own blog on http://blogs.technet.com/lobapps/ 

I'd especially like to point out a blog Guido Schmitt released about Hyper-V Failover Clusters. It provides a good overview and discussion around Host and Guest Clustering and the support by SAP on those cluster methods. Other articles circle around evaluating I/O capabilities and latency with tools available today or publications around system copies. One of the latest articles by Jock describes the upgrade process of a customer to SQL Server 2008 R2 ( http://blogs.technet.com/b/lobapps/archive/2010/09/29/upgrading-your-sap-databases-to-sql-server-2008-r2-using-the-system-copy-methodology.aspx ).

Some really good reads.  Cheers  Juergen