As already predicted last week by virtualization.info, Microsoft now offers Virtual Server 2005 R2 for free. Although both VMware Server and Virtual Server 2005 R2 are now free, I still recommend customers to use VMware Server. VMWare Server has more features (for example, 64–bit guests), is faster, and has a better management interface (web and gui). Since many companies evolve from VMware Server (or GSX) to VMware ESX, the upgrade path is also much simpler.