Jenny McCarthy, actress and author, believes that her young son Evan, who is autistic, is a "Crystal Child" and she is an "Indigo Mom", according to a recent blurb on Celebrity Baby Blog.  

What is an Indigo/Crystal Child?  According to Wiki:

The Indigo Child movement believes that the children in question are born with an empathic connection to Earth and others' thoughts......The Indigo Child movement therefore encourages parents to support those children in whom can be seen traits which are often labeled as negative by mainstream authorities but as positive by the Indigo Child.  Adherents believe that this new type of child has come forward for a reason; most often suggested is that they will improve the world in some way.

Some attributes of Indigo Children according to Carroll and Tober, authors of The Indigo Children:

They come into the world with a feeling of royalty.
They have difficulty with absolute authority.
They seem antisocial unless they are with their own kind. If there are no others of like consciousness around them, they often turn inward, feeling like no other human understands them. School is often extremely difficult for them socially.

   
More information here at Starchild and McCarthy's own website, indigomoms.com.

Of course, this is not without controversy:

Skeptics point out that the Indigo movement seems to lack verifiable evidence to support its claims....

Some skeptics are concerned that Indigo children might really be children who have special learning needs. They may have autism, Asperger's syndrome, non-verbal or even behavioural learning issues; by labeling children as "Indigo" such children do not get the services they need to succeed.

Critics have also voiced concern that teaching children that they are Indigo will encourage children to adopt sociopathic behaviors, such as a sense of human superiority, alienation, and a "bizarre" paranormal identity.