Sonnet Technologies announced several new products at Macworld Expo in San Francisco today. The Fusion R400Q is the latest addition to its line of Serial ATA drive enclosures. This 13.5″ deep, 4-bay rack mount drive enclosure provides four interface choices — FireWire 400, FireWire 800, USB 2.0, or for ultimate performance, SATA II. An integrated port multiplier supports up to four hard drives through any of the connections. Fusion R400Q includes drive mounting hardware for each of its four included drive trays, and a cable for each interface. Its trays are interchangeable with Sonnet’s Fusion 400 and Fusion 500P desktop SATA drive enclosures. Fusion R400Q will be available in March 2007 for US$699.