Here are a few links you might find useful or interesting:

J. K. Rowling ~ Jo's official site.

Pottermore ~ free interactive Harry Potter site

StarTiger ~ the no.1 site for autograph collectors

10th Planet Events ~ UK-based events organiser

Showmasters/Collectormania ~ UK-based event organiser

Dan's Autographs ~ Dan collects Harry Potter, Game Of Thrones, etc.

Wayne's Autographs ~ Wayne collects Harry Potter, Star Wars, Doctor Who, Lord Of The Rings, etc.

Llewellyne's Autographs ~ Sarai collects Harry Potter, Narnia, Twilight, etc.

Lostified ~ extensive collection of LOST autographs & memorabilia

Please contact me if you would like to see a link to your autograph collection on this page ~ I would appreciate a link to my site on your site, in return.  You can email me at: craig.halstead2@ntlworld.com