American Hyperlexia Association -
A precocious ability to read words, far above what would be expected at their chronological age or an intense fascination with letters or numbers; significant difficulty in understanding verbal language; and abnormal social skills, difficulty in socializing and interacting appropriately with people.
http://www.hyperlexia.org/

The Canadian Hyperlexia Association Page -
Information on a syndrome which interferes with language and social interaction, coupled with a precocious ability to read. Contains articles, strategies, personal stories, words from the kids, and general information about the CHA and support groups.
http://home.ican.net/~cha/

Hyperlexia and Language Disorders -
Information related to children ages six and over. Offers articles, resources, and information about a hyperlexia mailing list.
http://www.geocities.com/HotSprings/9402/

The Hyperlexia Parents' Network -
Contains articles, stories, a forum, parent support, and information about a book written by a parent of a child with Hyperlexia.
http://www.westwingpublishing.com/hyperlexia/