This one's my favorite.  A great resource when you're struggling with an issue with your child.  Lots of great advice and a wonderful article archive.

A great local resource.  They also have a lending library with lots of titles about parenting gifted kids.

A clearinghouse of resources for gifted kids and their families.  

A local non-profit that offers classes for parents and gifted kids.  They also host our annual Academic Challenge Cup.