I'm currently in the process of making two seperate servers, but within the same community of people. If you don't get what I mean, it's having one Main server, and one add-on server but keeping the same community of people. What I'd like is a chat that links between the two servers, so players on the Main server and the Add-on can talk to eachother, like an IRC. This would come in really useful, allowing friends to talk to eachother, whilst not being in the same server as eachother!
Why dont you just add two irc bots to the servers and let them listen to one irc channel? That would do.