From dictionary.com:
Usage Note: The transition from World Wide Web site to Web site to website seems to have progressed as rapidly as the technology itself. The development of website as a single uncapitalized word mirrors the development of other technological expressions which have tended to evolve into unhyphenated forms as they become more familiar. Thus email has recently been gaining ground over the forms E-mail and e-mail, especially in texts that are more technologically oriented. Similarly, there has been an increasing preference for closed forms like homepage, online, and printout.
(12/7/05)
