IRC Chat: We use the server IRC.COLDFRONT.NET, channel #FC for our chatting. If you don't have an IRC client installed, you can use the web-based mibbit.com to connect. Here's a direct link: Ker-Chunk
FC Wiki: Also hosted by the FC Resource (thanks, sk89q!), this wiki contains all sorts of useful information on levels, their history, some key users, how to build catapults, and anything else you want to write about!
edit: FC Resource is now down