Press Release:
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2018&mcparam=en534270
Application Notes: http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en534177
USB Host and Device Stack Download:
http://ww1.microchip.com/downloads/en/DeviceDoc/pic32mx_usb_v1_0_01.zip