Bored with this site? I don't blame you, there's not that much here. Check out these links to other Castlevania info/fansites. More coming as I find cool stuff.
This list is out of date. Sorry about that.
Chapel of Resonance
An awesome site with tons of content, including soundtracks, emulation, fanworks, articles, and a comprehensive timeline.
The Inverted Dungeon
Another very well-done information site, but with a sarcastic twist. Kind of like me, only funny. Dracula's backstory is especially hilarious, so be sure you pee before reading it. Also includes sprite comics, fanart, icons, and other fun stuff.
Mr. P's Castlevania Realm
Another extensive general site. Nice character and enemy info with tons of pictures, and a fun layout that uses a lot of graphics from the games.
Konami Official Site
The official Japanese site, newly redesigned. Looks sweet, very tasteful. Links to the official sites of all the most recent games, so it's a good jumping off point.