Links

Harry Potter Official Site
J.K. Rowling's Official Site
Mugglenet
The Leaky Cauldron
Scholastic's Harry Potter Site
The Harry Potter Lexicon
Willow's Character Guides

Fanfic
Prophecy Boys: a Harry/Neville Archive and Resource
Woobies of Destiny: a Harry/Neville Fuh-Q Fest
Nevillosity: a Livejournal community