Greek language learning materials are available from several vendors including EMC/Paradigm Foreign Language Products, Fairfield Language Technologies, Penton Overseas, various bookstores and computer software vendors, etc. See Foreign Languages.
ATHENMAZE series by Balme and Lawall (Oxford University Press) is available from various bookstores.
AUDIO-FORUM (http://www.audioforum.com) carries several Greek Language programs including: BASIC GREEK (developed for the State Department), for ages 13 to adult; THE PRONUNCIATION AND READING OF ANCIENT GREEK: A PRACTICAL GUIDE for ages ages 12 to adult, etc.
On-line Resources include:
ABOUT.COM's Cultures of the World area (http://home.about.com/culture/index.htm) includes links to resources related to various languages, cultures, etc.