As found on Martin Lewis's Money saving expert site.

Get a free reply from Santa

There are companies out there charging a tenner to reply to children’s letters to Santa. Yet you can do it for free. If children post (with stamp) a letter to Santa, Reindeerland, SAN 1TA before 13 Dec (though preferably earlier), the Royal Mail says he'll write back.

The website www.Northpole.com is Father Christmas's e-mail address apparently, and if children write there, he is now web enabled. !It seems Mrs. Christmas personally installed good ADSL up there.

What a lovely site. I think I will be fighting the kids for the computer when they see it!

This link is also quite good. The little ones can track Santa on christmas eve, with regular updates on his whereabouts.

http://www.noradsanta.org/index.php