Although the preferred means of communication regarding ServiceMix is always the mailing lists, you can also find most of us hanging out on the #apache-servicemix channel on the Codehaus IRC server. Many of us hang out there while we're working because it's a good place to have quick chats.
Connecting to IRC
Below is the connection information:
Note the IRC channel on codehaus is deprecated as of April 2015; please refrain from using that room.
Use the KiwiIRC Client
Other IRC Clients
To connect to the Codehaus IRC server, you'll need an IRC client. There's a decent list of IRC clients on Wikipedia along with some feature comparisons and other information.
The IRC log is publicly available for browsing.
The IRC log from the old #servicemix channel is publicly available for browsing.