Yeah, Hi-Speed USB (USB 2.0) is capable of 480Mbits/s and USB 1.1 is capable of a maximum 12 as pointed above by John. However, the theoretical 60Mbytes/s (480Mbits/s) will never be achieved so a practical maximum is ~40Mbytes/s for a USB 2.0 host. Thats best if the host is not being shared by another device.
In terms of wireless LAN...
802.11 - 1 or 2 Mbps transmission in the 2.4 GHz band.
802.11a - Up to 54 Mbps in the 5GHz band.
802.11b (or Wi-Fi) - 11 Mbps transmission in the 2.4 GHz band.
802.11g - Standard wireless coverage is max upto 54 Mbps in the 2.4 GHz band.
RangeMax™ or Super G™ - Extended wireless coverage upto 108 Mbps in the 2.4GHz band i.e. this USB2.0 adapter
RangeMax™ NEXT Wireless N - Max. wireless coverage at upto 300 Mbps i.e. this PCI aapter
In terms of wireless LAN...
802.11 - 1 or 2 Mbps transmission in the 2.4 GHz band.
802.11a - Up to 54 Mbps in the 5GHz band.
802.11b (or Wi-Fi) - 11 Mbps transmission in the 2.4 GHz band.
802.11g - Standard wireless coverage is max upto 54 Mbps in the 2.4 GHz band.
RangeMax™ or Super G™ - Extended wireless coverage upto 108 Mbps in the 2.4GHz band i.e. this USB2.0 adapter
RangeMax™ NEXT Wireless N - Max. wireless coverage at upto 300 Mbps i.e. this PCI aapter