Making a website for a homebrew campaign
I think it's worth pointing out that the in-game wiki isn't exactly feature-rich. It'll get the job done if you need something fairly simple, but if you want anything beyond a basic level of organization you'll need to handle that manually. Also, it has an odd mix of RuBB formatting and standard wiki styles, so you'll have to play around with that if you want to get fancy.
On the plus side, you don't have to worry about third-party hosting, it's part of RPoL's architecture.