While it's only a matter of time before solid state storage becomes cheap and reliable enough to replace magnetic media for good, companies like Western Digital are still finding ways to keep those platters a' spinning. Take this new WD VelociRaptor VR200M, for instance. Critics agree that while it doesn't offer anywhere near SSD levels of performance, it's certainly the fastest rotational SATA drive ever tested -- 15 to 30 percent improved over the last g