The Ian McKellen Website - Check out the Man who will be Gandalf.
Sir Ian (for he was indeed knighted) will be keeping a journal of his experiences filming LOTR in New Zealand.
And more often than not, if you email him at firstname.lastname@example.org he will respond to your questions! Pretty cool, eh? And don't forget to let us all know what you think by heading on over to The White Council, our messageboard.