There's a lot of info on the web:
http://www.mskcc.org/mskcc/html/11571.cfm?RecordID=712
http://www.pfaf.org/database/plants.php?Lycium+barbarum
http://en.wikipedia.org/wiki/Lycium_barbarum

If you don't find anywhere locally to obtain it, plants or seeds can be ordered from:
Flora Exotica, http://www.floraexotica.ca/Fruit.htm
Seeds can be ordered from:
Sand Mountain Herbs, http://www.sandmountainherbs.com/wolfberry_chinese.html
Richters Herb Specialists, http://www.richters.com/Web_store/web_store.cgi?product=X6925&cart_id=82918.388

If you need more info, you might ask in the Vine Forum.