Language Resources:
Arabic

American Association of Teachers of Arabic
Arabic 2000
Virtual Foreign Language Classroom: Arabic
Shariah Program - Online Arabic courses
ArabNet
Babel: Arabic - Online Arabic lessons accompanied by sound files. The first level of 12 lessons is free and there are two more levels that may be purchased.
Encyclopedia of the Orient
Islamic and Arabic Arts and Architecture Organization
Middle East Studies Association (MESA) of North America
Middle East Network Information Center (MENIC)
Lingualearn's Arabic page - Lots of links to vocabulary and grammar practice pages.
Arabic Flashcards
Arabic Alphabet
Library of Congress Portals to the World - Links to electronic resources around the world. Organized by country.