genius is right about, linking channels on different servers isn't a good idea because of server flood protection. Have you considered linking all DCC chat sessions for a particular client, that way the users would only need to DCC chat with a common bot and everyone on multiple servers could talk to each other. Then you don't need sockets either...
Using this arrangment, a client script that doesn't display the bot's name in the DCC chat window, would also be a nice touch, but it wouldn't be needed.
