In 1820, when he was sixteen years old, Hawthorne wrote a newspaper called The Spectator and delivered it to friends and family. The Phillips Library has archived all seven editions of The Spectator online in an interactive feature. Hawthorne's handwritten paper offered news, poetry, commentary and even advertisements.
The House of the Seven Gables is a historic site in Salem, Massachusetts containing several of the homes in which Nathaniel Hawthorne actually lived or wrote (some of the houses, including Hawthorne's birthplace, were moved here from their original locations). Their website has information about Hawthorne's life and times.
This site - funded by the National Endowment for the Humanities - is probably the most comprehensive Hawthorne site on the web. It contains helpful biographical information, as well as an impressive selection of primary documents. You can see documents such as Hawthorne's college-era bet with a friend that he'd stay single for at least twelve more years.
This site contains biographical information about Hawthorne, as well as an extensive selection of Hawthorne e-texts.
This unique site swept the Internet for the best Hawthorne miscellany. There are some great finds in here, like Hawthorne and Herman Melville's letters to each other, nineteenth century articles about Hawthorne, journal entries, and other hard-to-find texts.