Arabic language learning materials are available from several vendors including Fairfield Language Technologies, Penton Overseas, various bookstores and computer software vendors, etc. See Foreign Languages.
AUDIO-FORUM (http://www.audioforum.com) carries Arabic language materials for Saudi Arabic, Egyptian Arabic, Eastern Arabic, Levantine Arabic, Lebanese Arabic, Syrian Arabic, Moroccan Arabic, Iraqi, modern written Arabic, etc.
On-Line Resources include:
ABOUT.COM's Arabic Language and Culture area (http://hebrew.about.com/homework/hebrew/cs/arabic/index.htm) includes links to various resources related to Arabic language, culture, geography, etc.