Current revision of the USB spec with all available device class documents, whitepapers and also the compliance workshop checklists. http://www.usb.org/developers/
News and product reviews on both USB 1.1 and 2.0 peripherals and adapters. Also includes a FAQ and USB 2.0 driver update. http://www.everythingusb.com/
Supplies information, specifications, and white papers on the Universal Serial Bus, which provides an expandable, hot-pluggable plug and play serial interface that ensures a standard, low-cost socket for adding external peripheral devices. http://www.microsoft.com/hwdev/bus/USB/default.asp