Storage tech builder ATTO has announced a preview demonstration of the FastStream SC 8500, a new RAID controller, for this week's Macworld Expo. The 8500 is meant for high-end storage functions such as video editing, and can handle as many as five uncompressed HD streams simultaneously. It includes four 8Gb Fibre Channel host interfaces, and can connect up to 128 3Gb SAS or SATA drives, or else