In the ongoing push of higher data transfer, Intel has released part of the draft specifications for USB 3.0.  Set to become widely available by 2010, USB 3.0 allows data transfers 10 times that of the current 480Mbps.  The 4.8Gbps speed comes due to the massive amounts of storage and data transfer needs of the ever increasing storage mediums.  This current spec is available freely to all USB 3.0 promoter groups.