From: episodeii.com

ANAKIN ALREADY CAST?
Natasa Micuda writes in today with some info from the
paper TV Media in Austria. Natasa explains that Anakin
has been chosen, and it will be Colin Hanks, the son
of actor Tom Hanks. Apparently Lucas has already had a
few "talks" with the 22 year-old Colin. To add to this
rumor, Episode-X has a source that reports:

Roswell's Colin Hanks will be Anakin Skywalker! This
bit on insider news comes from a source close to me
and very close to Colin Hanks's agent. Not only has
Hanks been to the Skywalker Ranch many times, he is
now about
to close the deal for his pay. He will be among the
many to read with Portman this weekend, and if the
chesmistry is right he will sign next week."