This is a page where you can find other websites that'll help you satisfy you're other Potter needs. :)

http://www.mugglenet.com is an awesome, up to date fan site with news, photos, and SO much more
http://www.snitchseeker.com , see above!
http://www.harrypotter.com is the official Harry Potter Website
http://www.pottermore.com is a website by JK Rowling herself telling all of the information that we didn't get in the books. Coming October 31, but I'd go and check it out! FOLLOW THE OWL!
http://www.harrypotter.wikia.com is the official Harry Potter wiki!