Trans International announced the immediate availability of its Serial-ATA mobile hard drives for the MacBook and MacBook Pro on Monday. The Trans SATA mobile internal 2.5-inch drives are available in 5400 and 7200 rpm speeds, and in 100GB or 120GB capacities. The 120GB 5400rpm Western Digital mechanism is priced at US$149, the 100GB 7200rpm Hitachi TravelStar is $189, and the 100GB 7200rpm Seagate Momentous costs $199.