I would love to affiliate with any video-game related websites. If you want to link this site, here is a button. Donations are encouraged since it's no secret I hate making buttons, lol. Save to your own server!
This game does not have a lot of places on the net to go to learn about and kill time at. Here are a few sites I am familiar with.

The Heiress This is a fanlisting for Fiona Belli. It's a very great site with lots of unique images.
Stalking Insanity This is a huge site with tons of content for not only Haunting Ground, but for other horror games as well.
US Official Capcom Site Self-explanatory. Unfortunately, this site is terribly outdated, but does have gameplay footage.
JP Official Capcom Site Self-explanatory. This website, although in Japanese, has a lot more to offer than the US site, including awesome wallpaper!