I have never read a shallower article. Sure VMWare is faster, but they have been around for much longer. MS Virtual Server was originally developed by some other company that MS took over. It's got a vastly superior API that makes app dev a lot easier. For VMWare you would have to buy the expensive Virtual Center, the C API that VMWare is releasing with their free server is in deep deep Beta. It's the usual MS strategy - make things easier for developers,ISV's, and partners first and worry about performance later. The flurry of moves that VMWare is making in the last three months is indication that they are far more aware of the very real threat from MS Virtual server than the average Slashdot Idiot.