Sony's VAIO UX390 is one of the few UMPCs out there with a flash-based drive. It's got Windows Vista installed and of all the UMPCs around, it's the only one that can give OQO's Model 02 a run for it's money. The question is, does it? The folks at CNET gave it a test spin and deemed it the best UMPC they've seen to date. They loved the 32GB flash drive, the extended battery life, and the UX390's ports. So is the Model 02 DOA? Not so fast.