So I sent Nintendo an e-mail asking about the actions taken against Serebii and Pokebeach. This is the vague response I got in return:
Hello (My name was here),
Thanks for contacting us about our request regarding Pokemon Black and White images. I wanted to let you know that Nintendo supports and appreciates the efforts that Pokemon fans go through to create fan sites. In most cases there is no issue with the content that is posted, but on this occasion we had to contact a select few websites to ask them to take down confidential images.
I also wanted to let you know that your comments have been documented and made available to other departments to use as they see fit. Thank you for taking the time to share them with us.
Sincerely,
(Nintendo lady's name was here)
So apparently they are keeping everything sent to them about the issue. I still do not understand what was confidential. So from what she sent me I would guess that they are aloud to post images now that the games are out to the public.