Experts will be happy to know that OrbitIRC doesn't skimp when it comes to advanced features either. Public, private, and DCC chatting are all supported, as are object scripting, flood protection, auto-logging, and menu mod capabilities (for customizing the chat menu).
OrbitIRC also offers a file server for allowing users to download files from your computer, advanced sound customization for playing WAV and MID files during different events, DCC file transfers for sending and receiving files over IRC, automatic notification capabilities for alerting you when one of your friends joins or leaves an IRC channel, and real raw-protocol accessibility for those crazy enough to want to see the arcane IRC RFC1459 commands being exchanged between OrbitIRC and the IRC server.