Pottermore IS the ultimate Harry Potter experience... coming from a Beta user from early signup. Its amazing. If you don't have an account, I suggest getting one in October when it opens to the public.
Yes
They put a charm on you when you log in... I think...
Sort of, it is called Pottermore and opens in October.
Pottermore is British. It is in the GMT timezone.
Pottermore does not have a search engine.
Pottermore is out for public release is October
Rupert Grint does not have a Pottermore account.
No. Pottermore opened to the public on 14th April 2012.
There are currently over 10.8 million registered users on Pottermore.
you need an email address to sign up to pottermore
Yes, you need an email address to register on Pottermore.
You can find a guide on the Pottermore Wikia.