FYI, they already have a release date for the DVD/video. November 26 - just in time for Christmas!
Also, for any Lord of the Rings fans, there are actually 2 releases of the DVD. The basic movie and extras, 2 disc set, will be released in August. But if you can wait, there is a 2nd release scheduled for November that will include a LOT of extras - 5 disc set.