Thanks to Joram for this scoop:

New Line Cinema is preparing their official site,
www.lordoftherings.net, for future use it seems.

Checked out the new 1 volume LOTR paperback that
is available in bookstores. Nice job for a paperback
even though a little pricey for most people, $20 list.

Anyway, if you look at the back cover there's a New
Line logo. Underneath the logo it states that LOTR
will be an upcoming film and next to the logo is the
URL: www.lordoftherings.net. A quick check of Web
Whois confirms that this is registered to New Line. It
looks like this will be the official site!

If you go there now all that is up is a simple html
page stating "Lord of the Rings -
www.lordoftherings.net." But, with the paperback out
you have to believe that this site will be active pretty
soon.

Thanks goes out to 'Esad' for some excellent
sleuthing!