I waited to receive my drive from them before posting this seeing how the site looks a bit amateur-ish. They sent me my free drive, so now i'm posting. Advertisers pay the site to put their logo on the usb drives, and using that money, plus money from ads on the site they are able to send free usb drives. Also, they don't even ask for an email address to spam you with!
http://www.FreeUSBDrive.com