Expat.com is a worldwide directory of blogs related to expatriate life, with listings for Saudi Arabia.
Internations provides information for the relatively limited opportunities to move and settle in the sparsely populated land of Saudi Arabia, with its own very unique culture.
U.S. Department of State - Bureau of Consular Affairs provides very important information about travel to Saudi Arabia.
Lonely Planet Travel Guide
provides a lot of useful travel information, with a section on the Middle East, including Saudi Arabia.