Something that came across my inbox today - the relaunch of TechNet and MSDN virtual labs. Hosted by Microsoft using Virtual Server technology, each lab includes a set of learning tasks totalling 90 minutes. The whole setup is capable of supporting 1200 concurrent users. Example labs include ISA Server, Visual Studio 2005, SQL Server 2005, SMS 2003 and Sharepoint Portal Server. Links to: TechNet Virtual Labs and MSDN Virtual Labs