My experience with USB support under OS4 has been pretty terrible. Most USB sticks aren't recognized at all and other sticks get scrambled or have read/write errors. Not to mention that there's no USB2.0 support. I'm using a PegII/ODW which has USB2.0 ports and it would be nice if OS4 supported them but I doubt I'll ever see it. Hyperion is focusing on the the X1000......