It turned out the price was spot on and the article was correct as far as I can see.
I agree that it's 'just from a forum', this one turned out to be surprisingly well informed. My take on that is that it is a secret known by so many people that if there is a place it's going to be leaked is in a forum.
Why not wait until Monday to post official pictures/specs/pricing? Visit Engadget if you want rumors.